Exploratorium photos - Aruba, 1998. In 1998, the Exploratorium launches its first eclipse webcast expedition, partnering with the Discovery Channel and making its first connections with NASA. At this time, no one has ever webcast an eclipse live before. To catch the one on February 26, 1998, the crew travels to Aruba, a small Caribbean island …

 
Dec 15, 2023 · The project invited young people to share stories, pictures, sounds, and 3D models of their own creation, and to assemble them into a navigable, three-dimensional city model. CitySpace at Multimedia Playground '95 was the first-ever internationally networked virtual environment, linking visitors at the Exploratorium and the Ontario Science ... . Speakeasy fitness van nuys

San Francisco's Buried History is an online audio walking tour that uses interviews, photos, and augmented reality to delve beneath the streets to reveal Gold Rush history, natural history, and the past and continuing presence of Indigenous peoples. Be sure to download and print this map, which lets you access the tour's augmented reality features. The Outdoor Gallery is an open-air space with wonderful views of the San Francisco city skyline, including Coit Tower and the Bank of America Building. Watch shifting winds and tides, explore the Fog Bridge, reveal hidden life, observe human behavior, and find new ways to notice the places we inhabit. Gallery. Exploratorium Store. Sonntag: 10:00—17:30. Montag: Geschlossen. Dienstag—Mittwoch: 10:00—17:30. Donnerstag: 10:00—22:30. Freitag—Samstag: 10:00—17:30. Auch wenn das Exploratorium alle notwendigen Sicherheitsprotokolle und -prozeduren befolgt, sind wir uns bewusst, dass überall dort, wo sich Menschen aufhalten, ein gewisses Risiko ... The guiding principle of the Gallery 5 is to support and expand the Exploratorium’s role as a community museum dedicated to awareness. Helping to reinvent the civic role of a public museum as a place to gather and exchange ideas, the gallery also exemplifies how direct observations of natural and urban phenomena can blossom into artistic endeavors, …Specialties: Homegrown, handmade and hands-on, there's no place in the world like the Exploratorium. Now that we're moving to Pier 15, there's more to explore than ever before. Called "the best science museum in the world," by Scientific American, the Exploratorium is an experimental, hands-on museum, designed to spark curiosity--regardless of age. Like …The arts are a fundamental method of discovery at the Exploratorium. We engage artists in every facet of our work and in a multitude of ways to inspire curiosity and further an interdisciplinary approach to seeing and understanding the world. From creating long-lasting exhibits on our museum floor to developing unforgettable …Click on the thumbnail images to see a larger image The lobby of the Space Telescope Science Institute, where monitors show the location of Hubble, the space station, and a variety of orbiting satellites. ... Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ... Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. Observing Landscapes. Uncover the history, geography, and ecology of the Bay Area. Natural and human forces interact to create the dynamic landscape surrounding us. Learn to uncover the stories embedded in a place by directly observing the geography, history, and ecology of the San Francisco Bay region.Daytime Member & Donor Hours. Every Sunday, 10:00 AM–Noon. Our Daytime members, donors, and Corporate Members can enjoy exclusive access to the Exploratorium every Sunday morning. The Exploratorium and NASA have teamed up to bring you live eclipse coverage for over 20 years. This material is based upon work supported by the National Aeronautics and Space Administration under Grant No. NNX16AB96A issued through the Science Mission Directorate (SMD). Prepare for the next eclipse on April 8, 2024. Exploratorium: Faultline: 1906. ithin minutes, fires broke out from ruptured gas mains, wood stoves, cooking fires, toppled lanterns. No fire alarms rang: the alarm system, headquartered on Brenham Place in Chinatown, was run by wet-cell batteries stored in glass jars on shelves. Every one of the jars had fallen to the floor and broken in the ...Photo Credits. Mercury - Astrogeology Team , U.S. Geological Survey. Venus - No attribution (probably NASA) Moon - No attribution. Mars - Space Telescope Science Institute. Jupiter - NASA Jet Propulsion Lab taken by Voyager 1. Io - NASA Jet Propulsion Lab taken by Galileo. Europa - NASA Jet Propulsion Lab taken by …The Exploratorium is ranked #30 out of 30 things to do in San Francisco. See pictures and our review of The Exploratorium.Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. ... Click on the thumbnail images to see a larger image Looking in on the simulation room at Goddard ...Photos from past events show what to expect in 2024 A total solar eclipse in April will cross 13 US states: ... Solar Eclipse is an "innovative" app developed by the …We’re proud to offer this 40th anniversary look at the Exploratorium. In addition to bringing the excitement of exploration to people of all ages at our home in San Francisco, the museum has also influenced science education on an international scale. Voted “Best Science Center in the World” by attendees of the 4th Science Center World ...Pier 15 (Embarcadero at Green Street) San Francisco, CA 94111 415.528.4444. Contact UsCheck out our Exploratorium Geometry image pool on Flickr, and contribute your own photos. Geometry Playground is made possible by the National Science Foundation and the Gordon and Betty Moore Foundation . Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author(s) and do not …102K Followers, 674 Following, 4,112 Posts - Exploratorium (@exploratorium) on Instagram: "Tinker, touch, test, experiment, notice, and play with 650+ interactive … Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. Have you ever wondered what's inside an eye? Do you want to learn how to dissect a cow's eye and discover its amazing structure and function? Follow the instructions on this webpage and explore the anatomy of a cow's eye with your own hands. You will also find helpful resources, such as a primer, a glossary, and a diagram of the … Exploratorium Science Snacks are teacher-tested science activities that bring explorations of natural phenomena to wherever you are. Each Snack uses inexpensive, readily available materials suitable for the classroom and the curious. We’ve made some special collections just for you, including Snacks suitable for K–5 students, Snacks using ... The Exploratorium is a museum of science, technology, and arts in San Francisco, California.Founded by physicist and educator Frank Oppenheimer in 1969, the museum was originally located in the Palace of Fine Arts and was relocated in 2013 to Piers 15 and 17 on San Francisco's waterfront.. The museum has over 1,000 …The Exploratorium was founded in 1969 by physicist and educator Dr. Frank Oppenheimer, brother of the renowned physicist J. Robert Oppenheimer. Originally housed at the Palace of Fine Arts, the institution stated its mission clearly from the outset: to nurture learning through active exploration. Dr. Oppenheimer’s vision …Browse 298 professional exploratorium san francisco stock photos, images & pictures available royalty-free. Download Exploratorium San Francisco stock photos. Free or royalty-free photos and images. Use them in commercial designs under lifetime, perpetual & worldwide rights. Dreamstime is the world`s largest stock photography community. Tinkering at Home. Tinkering is an active, hands-on approach to discovering the richness and depth of the world around you—and it lends itself perfectly to the home environment, using materials and tools you might already have to explore everyday phenomena in surprising ways. Try this collection of invitations and resources to get started. Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. Give yourself the royal treatment at tonight’s After Dark. Learn about king tides—the non-scientific term for the highest tides of the year—with Exploratorium scientists and researchers. This season, two out of three king tides will take place on January 11 and 12. Are the king tides of today the normal high tides of tomorrow?About. The Exploratorium is more than an iconic San Francisco museum perched by the Bay—it’s an all-ages gateway to joyful exploration of science, art, and human perception. …Your Exploratorium wedding includes: ¬ Classroom for belongings and finishing touches for the couple + wedding party ¬ One-hour photo shoot throughout the museum (with your own photographer) ¬ Dual Explorers Membership Level for one year ¬ Engaging, interactive exhibits in the gallery rented ¬ “Explainer” staff to conduct live demos and explore exhibitsScales measure the force of attraction between you and the Earth. This force of attraction between you and the Earth (or any other planet) is called your weight. If you are in a spaceship far between the stars and you put a scale underneath you, the scale would read zero. Your weight is zero. You are weightless.Expedia's collection of beautiful photos and images from destinations all around the world. Pictures and video that will inspire your own travel photography adventure.Scales measure the force of attraction between you and the Earth. This force of attraction between you and the Earth (or any other planet) is called your weight. If you are in a spaceship far between the stars and you put a scale underneath you, the scale would read zero. Your weight is zero. You are weightless.At The Exploratorium Nursery School our mission is to provide a quality, comprehensive early childhood environment for nurturing and facilitating the growth and development of young explorers. At The Exploratorium Nursery School our philosophy is based on the idea that learning should be an adventure and explorers grow and develop …Daytime Member & Donor Hours. Every Sunday, 10:00 AM–Noon. Our Daytime members, donors, and Corporate Members can enjoy exclusive access to the Exploratorium every Sunday morning. Browse Getty Images' premium collection of high-quality, authentic Exploratorium San Francisco stock photos, royalty-free images, and pictures. Exploratorium San Francisco stock photos are available in a variety of sizes and formats to fit your needs. Photo Credits. Mercury - Astrogeology Team , U.S. Geological Survey. Venus - No attribution (probably NASA) Moon - No attribution. Mars - Space Telescope Science Institute. Jupiter - NASA Jet Propulsion Lab taken by Voyager 1. Io - NASA Jet Propulsion Lab taken by Galileo. Europa - NASA Jet Propulsion Lab taken by …Stop Motion Animation Explorations. Bring you stories to life! Stop motion animation is a simple approach to creating movement on a screen. The tools are easy to use (and often free). Use a wide variety of materials to tell a story, share a joke, and animate the world around you. Share your creations with #StopMotion #TinkeringAtHome.Soap Bubbles - Basic Properties, Bubble Recipe & More | Exploratorium. W hat is so fascinating about bubbles? The precise spherical shape, the incredibly fragile nature of the microscopically thin soap film, the beautiful colors that swirl and shimmer, or most likely, a combination of all these phenomena? Why does a bubble form a sphere at all?Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. ... a photo signed by space shuttle astronauts thanks her for her hard work …Assembly. Cut a hole about 1 inch (2.5 cm) square in a card. Tape a piece of aluminum foil over the hole in the card and use the pin to punch a small hole in the center of the foil. (You can make a good pinhole by placing the foil on a thick piece of cardboard and rotating the pin.) If your light bulb already has writing on it, you're all set.Sound Sculpture by Masary Studios. Photo by All Seeing Media, courtesy of the Exploratorium. The 2023-2024 exhibition presents 10 light artworks by 7 artists, ranging in size and scope.Here’s a quick rundown: Line Wobbler (Robin Baumgarten) – Control a green pixel as it moves along an LED strip, battling enemies, lava, and force fields.; … Meet some of the scientists and technicians who work at CERN, the world's largest particle physics laboratory - learn about their research and motivations and why they chose to become physicists. Explore webcasts, stories, dispatches, photos, and articles of total and annular solar eclipses and transits. Fostering Active Prolonged Engagement: The Art of Creating APE Exhibits. ... The Exploratorium is a 501(c)(3) nonprofit organization. Our tax ID #: … Our guests had free admission to the Exploratorium prior to the wedding, and we had a fun time taking newlywed photos wherever we wanted after the museum closed. Most importantly, Katie, Billy, and Lauren had such close communication with us, our wedding coordinator, and all the vendors throughout the entire process, everything went so smoothly. Tinkering at Home. Tinkering is an active, hands-on approach to discovering the richness and depth of the world around you—and it lends itself perfectly to the home environment, using materials and tools you might already have to explore everyday phenomena in surprising ways. Try this collection of invitations and resources to get started. Here at the Exploratorium, we’ve been building our own interactive exhibits since 1969. Explore our exhibits online –from the science behind the exhibits to behind-the-scenes stories from our exhibit developers, continue following your curiosity wherever you are. Pro-tip: For the latest tips and ideas from the Exploratorium, stay connected ... Expedia's collection of beautiful photos and images from destinations all around the world. Pictures and video that will inspire your own travel photography adventure. Assembly. Cut the same simple shape, such as a bird or a fish, from each of the three colored papers. Glue each shape to its own white board. Draw an eye on each bird or fish with the marking pen. On the fourth white board, if you chose a bird as the shape, draw the outline of a birdcage as in the photo below; if you chose a fish, draw a fishbowl.Sound Sculpture by Masary Studios. Photo by All Seeing Media, courtesy of the Exploratorium. The 2023-2024 exhibition presents 10 light artworks by 7 artists, ranging in size and scope.Here’s a quick rundown: Line Wobbler (Robin Baumgarten) – Control a green pixel as it moves along an LED strip, battling enemies, lava, and force fields.; …Earlobes can be described as “free” or “attached.”. Attached earlobes are connected directly to the head, while free earlobes hang down below that point of connection. Organize the pictures into a continuous line, from most free to most attached. Next, divide the pictures into just two groups: free or attached.April 21, 2011. 5 min read. Pier 15 Project Highlights. Overview. Piers 15/17 on the Embarcadero have allowed the Exploratorium to dream big. For the first time in over 50 years, a view corridor to the San Francisco Bay will open to the public. Between Piers 15 and 17, just off the Embarcadero, a parking lot is removed and transforms into a ...A total solar eclipse is perhaps nature's most awe-inspiring event—and the Exploratorium has been webcasting live eclipse coverage worldwide since 1998. Let’s get cooking—Hungry for Science is a video series that explores the science behind tips and tricks in the kitchen. Sometimes you just need a snack—something quick and light to tide ...Press Office. The Exploratorium celebrates the role a free press plays in cultivating an informed, curious, and confident society. Our press office exists to help working journalists find stories worth telling, access materials and experts, and to support you in sharing our work with the world. Join our press list to stay informed.The Exploratorium is more than an iconic San Francisco museum perched by the Bay—it’s an all-ages gateway to joyful exploration of science, art, and human perception. Let your curiosity roam free through hundreds of exhibits in six spacious indoor and outdoor galleries. ... Picture a huge airplane hanger style (several) all out overlooking ...Specialties: Homegrown, handmade and hands-on, there's no place in the world like the Exploratorium. Now that we're moving to Pier 15, there's more to explore than ever before. Called "the best science museum in the world," by Scientific American, the Exploratorium is an experimental, hands-on museum, designed to spark curiosity--regardless of age. Like …If you build your solar system on a roll of toilet paper, you can make the Sun about .4 inches (10 mm) across and still fit the entire solar system on the roll. A standard roll of toilet paper has about 450 sheets that are about 4.375 inches long, hence the roll is about 164 feet long. You should check your toilet paper for length.Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the …April 21, 2011. 5 min read. Pier 15 Project Highlights. Overview. Piers 15/17 on the Embarcadero have allowed the Exploratorium to dream big. For the first time in over 50 years, a view corridor to the San Francisco Bay will open to the public. Between Piers 15 and 17, just off the Embarcadero, a parking lot is removed and transforms into a ... And then absorb and digest the science of fungi with Exploratorium scientist Julie Yu and special guest Cat Adams, who will share their insights into mushroom preparation and the surprising effects of fungal fragrances. Mushrooms is part of our Pairings event series at After Dark. If you intend to consume alcohol, please remember to bring your IDs. Science Snacks are hands-on, teacher-tested activities that bring explorations of natural phenomena into the classroom and home. Explore Snacks. Exciting science activities based in amazing phenomena.9 Photos. AAA Editor Notes. Exploratorium is at Pier 15, at the foot of Green St. and The Embarcadero. The building has a contemporary industrial look, with six galleries displaying some 650 exhibits, most of them interactive. The Microscope Imaging Station in Gallery 4 produces high-resolution images of minuscule organisms like plankton and ...Give yourself the royal treatment at tonight’s After Dark. Learn about king tides—the non-scientific term for the highest tides of the year—with Exploratorium scientists and researchers. This season, two out of three king tides will take place on January 11 and 12. Are the king tides of today the normal high tides of tomorrow? The Exploratorium, established in 1969, is an internationally renowned museum of art, science, and human perception located in San Francisco, California. Its hundreds of hands-on exhibits are designed to promote science discovery. Global Collaborations The Exploratorium's mission is to create inquiry-based experiences that transform learning ... Thursday, March 14, 2024 • 11:00 a.m.–3:00 p.m. Join the 37th annual celebration of our own homegrown holiday! March 14th (3/14) commemorates the irrational, transcendent, and never-ending ratio that helps describe circles of all sizes. Explore math-inspired activities and presentations, then join our pi parade and eat a free …The Exploratorium’s home at Pier 15 of San Francisco’s Embarcadero places us at the center of one of the city’s most exciting tourist destinations. We are perched on the edge of San Francisco Bay where land meets water, where art meets science, and where San Francisco’s beautiful skyline pushes into the sunset.Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. ... Click on the thumbnail images to see a larger image An arial view of NASA's clean room, where the ...Find exploratorium stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day. ... 384 exploratorium stock photos, vectors, and illustrations are available royalty-free. See exploratorium stock … Aurora Links and sources. The Aurora Page at Michigan Technical University, features photographs by Jan Curtis. Beautiful aurora photographs. "Space Weather" at Rice University. A collection of aurora photos and information. See a QuickTime Movie illustrating the magnetosphere. Space Weather at NASA. Get the latest on solar events and their ... Every Thursday Night • 6:00–10:00 p.m. Meet us at Pier 15. No kids allowed—but you can still act like one. Unplug and play with 650+ interactive exhibits exploring science, art, and perception. Encounter the unexpected with programming that invites you into the worlds of the thinkers and creators changing our communities.Eclipses are a great time to notice sun images among shadows! The left image shows images of the sun before first contact. The center image shows images of the sun during a partial phase. On the right, we see the slim crescents just before annularity. After having experienced this eclipse, it’s time to make plans to see the very different ...Coordinates: 37.8014°N 122.3976°W. The Exploratorium is a museum of science, technology, and arts in San Francisco, California. Founded by physicist and educator … Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. Photo by Aram Boghasian. SAN FRANCISCO (October 2, 2023) – The Exploratorium’s annual celebration of luminous artworks, Glow: Discover the art of light, returns to Pier 15 on November 16, 2023 with new works for all ages to enjoy. Compose music with light, touch quantum physics, play LED dungeon crawlers, unveil hidden crystals, see ... Specialties: Homegrown, handmade and hands-on, there's no place in the world like the Exploratorium. Now that we're moving to Pier 15, there's more to explore than ever before. Called "the best science museum in the world," by Scientific American, the Exploratorium is an experimental, hands-on museum, designed to spark curiosity--regardless of age. Like …Blog. Check out the Tinkering Studio blog for a behind the scenes look at activities and ideas we're exploring. Experiment with science, art, technology, and delightful ideas.Aurora Links and sources. The Aurora Page at Michigan Technical University, features photographs by Jan Curtis. Beautiful aurora photographs. "Space Weather" at Rice University. A collection of aurora photos and information. See a QuickTime Movie illustrating the magnetosphere. Space Weather at NASA. Get … Meet some of the scientists and technicians who work at CERN, the world's largest particle physics laboratory - learn about their research and motivations and why they chose to become physicists. Every Thursday evening, one of San Francisco's premier museums opens up its doors for an After Dark gathering of the coolest kind. The Exploratorium transforms into an adults-only intellectual playground, welcoming everyone 18 and older to dance, mingle, and explore while sipping on cocktails (own expense) and participating in the museum's ongoing …We’re proud to offer this 40th anniversary look at the Exploratorium. In addition to bringing the excitement of exploration to people of all ages at our home in San Francisco, the museum has also influenced science education on an international scale. Voted “Best Science Center in the World” by attendees of the 4th Science Center World ... With Julia Goodman, Dr. Isabel Hawkins, and Dr. Aparna Venkatesan. The moon moves the tides and stirs our imagination. As a shared cultural heritage, there are many ways the moon inspires us to consider its role in our lives. Join artist Julia Goodman, astronomer Isabel Hawkins, and cosmologist Aparna Venkatesan to examine our ever-changing ... Exploratorium. 157K followers • 796 following. Photos. Exploratorium, San Francisco, California. 153,908 likes · 368 talking about this · 331,625 were here. The Exploratorium …The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate. It’s found naturally in most plants, but especially in sugarcane and sugar beets—hence their names.

Place the remaining piece of the head of lettuce or bok choy in a shallow dish of water, bottom-side down. Celery: Cut off the stalks about 1 1/4 inches (3 cm) from the bottom of the head. Place a celery stalk in a glass of water. Place the bottom of the head into a shallow bowl of water. Scallions: Cut the green part from the white part.. Momonoki

exploratorium photos

Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the …Pier 15 (Embarcadero at Green Street) San Francisco, CA 94111 415.528.4444. Contact UsExploratorium. 157K followers • 796 following. Photos. Exploratorium, San Francisco, California. 153,908 likes · 368 talking about this · 331,625 were here. The Exploratorium …Picturing the Human Body | Exploratorium Magazine. The Exploratorium Magazine Online selects key articles and activities from the print version which takes an in-depth look at a … Visit the Hubble Space Telescope, with live webcasts from Mission Control and the Exploratorium. See how Hubble's pictures change our ideas about the universe, meet the people who keep the telescope up and running 370 miles above the earth. Named Chicagoland's "Top Rainy Day Destination" by the Chicago Tribune, the Exploritorium is a place where children and adults visit to explore together through interactive play. Recommended for toddlers through age 6, children can make-believe in our costumed dress-up area; run your fingers through our water play …Pier 15 (Embarcadero at Green Street) San Francisco, CA 94111 415.528.4444. Contact Us Browse Getty Images' premium collection of high-quality, authentic Exploratorium San Francisco stock photos, royalty-free images, and pictures. Exploratorium San Francisco stock photos are available in a variety of sizes and formats to fit your needs. from. £272.34. per adult (price varies by group size) Explore the Instaworthy Spots of Aarhus with a Local. Art Tours. from. £94.84. per adult (price varies by group size) Full Day Private Shore Tour in Copenhagen from …Place a narrow opaque object, such as a pencil, fairly close to the screen. Adjust the distance until you see three distinct colored shadows on the screen. Remove the object, turn off one of the colored lights, and notice how the color on the screen changes. Put the object in front of the screen again and notice the colors of the shadows.Please note: The Exploratorium is dedicated to expanding access to all by providing free and reduced admission opportunities. Learn More. 1. Choose Your Date ... Photos/Videos: Ticket holder may be photographed or video recorded on premises; photos/videos taken by visitors authorized for personal use only.Aruba, 1998. In 1998, the Exploratorium launches its first eclipse webcast expedition, partnering with the Discovery Channel and making its first connections with NASA. At this time, no one has ever webcast an eclipse live before. To catch the one on February 26, 1998, the crew travels to Aruba, a small Caribbean island …Stop Motion Studio application. The free version of this application will let you quickly take and combine multiple photos into an animation. Phone or tablet and something to hold it in place. Make a stand out of books, blocks, or LEGO to hold your device in place and make sure your images line up. Everyday objects to animate. Consider …Make your faces wink, blink, smile, frown, yawn, and more by using stop motion animation to bring your faces to life! Keep your camera in exactly the same spot and take photos as you change your face's expressions in subtle or surprising ways. Learn more about how you can start stories with stop motion in only two images ….

Popular Topics