Science Friday Video Podcast
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Science Friday, as heard on NPR, is a weekly discussion of the latest news in science, technology, health, and the environment hosted by Ira Flatow. Ira interviews scientists, authors, and policymakers, and listeners can call in and ask questions as well. Watch the latest science videos from the Science Friday website.
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The Look Of Love
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Author: ScienceFriday.com
Fri, Feb 10, 2012
News you can use for Valentine's Day: When you gaze into your sweetheart's eyes, look for enlarged pupils. Psychologist Bruno Laeng says our pupils don't just respond to light, but to thoughts too. Studies show that our pupils dilate when something captures our attention, including when we feel strong emotions. Laeng discusses how psychologists are using "pupillometry" in the lab.
 Download File - 27.4 MB
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Creating Earth
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Author: ScienceFriday.com
Fri, Feb 03, 2012
NASA’s iconic images of Earth from space date back to the late 1960s--with snapshots taken by Apollo astronauts. The modern “blue marble” images are captured by machines and they’re not photos. They’re datasets collected by instruments aboard satellites and then translated into imagery on the ground.
Download File - 48.9 MB
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Ode To Ice
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Author: ScienceFriday.com
Fri, Jan 27, 2012
Ice can be difficult to get a handle on, literally and figuratively. It can be cloudy or clear, as hard as concrete or as soft as a snowflake. We spoke with two ice experts--an ice sculptor and ice researcher--about the slippery material, to find out what fascinates them about frozen water.
Download File - 47.8 MB
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Mini Speed Demons
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Author: ScienceFriday.com
Fri, Jan 20, 2012
From mantis shrimp to trap-jaw ants, some of the fastest organisms on the planet are ones you may have never heard of. Biologist Sheila Patek, of the University of Massachusetts Amherst, says the creatures she studies move at speeds that are hard for us to imagine, let alone perceive. A high-speed camera is a must.
Download File - 47.8 MB
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Computer Of Bubbles
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Author: ScienceFriday.com
Fri, Jan 13, 2012
Bubbles can do computations, says Stanford professor Manu Prakash. Just like electrons running through wires in your computer, Prakash directed bubbles through tiny etched tubes and showed basic computations were possible. Bubbles are bigger and slower than electrons, but they can carry things--meaning you could create as you compute, Prakash says.
Download File - 44.5 MB
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What Happens When You Levitate Flies?
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Author: ScienceFriday.com
Fri, Jan 06, 2012
Everything is a little bit magnetic, says physicist Richard Hill. So with a powerful magnet, it is possible to levitate almost anything--strawberries, water, insects. In a recent study, Hill levitated fruit flies to see how they behaved when they didn't have gravity pulling them down.
Download File - 33.4 MB
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The Hunt For A Vanishing Woodpecker
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Author: ScienceFriday.com
Fri, Dec 23, 2011
In 1956, dentist and amateur ornithologist William Rhein captured the rare Imperial woodpecker on 16 mm color film. Although this 85 second clip is the only known photographic record of the bird, Rhein kept the film to himself until after he died. Writer and bird fanatic Tim Gallagher tells the story of Rhein’s expedition to look for the bird, and his own trip to the same mountains over 50 years later.
Download File - 41.5 MB
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Taking Paper Airplanes To The Next Level
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Author: ScienceFriday.com
Fri, Dec 16, 2011
Researchers are designing tiny paper aircraft and making them fly using a pot, a speaker and a bunch of straws. When the subwoofer plays a low-frequency tone, it pushes the air above it up and down, which is funneled through the pot and straws, creating a flow of pulsing air. The system simulates flapping flight by taking the flap out of the wings and putting it into the air.
Download File - 57.9 MB
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Working Out The Jump Rope
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Author: ScienceFriday.com
Fri, Dec 09, 2011
While warming up for a pickup basketball game, Howard Stone and Jeff Aristoff wondered if anyone had mathematically modeled the shape of the jump rope. The researchers decided to give it a whirl.
Download File - 33.6 MB
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Pigeons Fly Like Tiny Helicopters
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Author: ScienceFriday.com
Fri, Dec 02, 2011
Harvard researchers trapped pigeons in a parking garage and filmed them with high-speed cameras to see how they make tight turns at low speeds.
Download File - 40.7 MB
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Behold The 1000-Pound Pumpkin
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Author: ScienceFriday.com
Fri, Nov 25, 2011
Visit Robert Sabin's pumpkin patch: he has been growing giant pumpkins--the breed is Atlantic Giant--for over ten years. Does his top pumpkin have the heft to win the Long Island Giant Pumpkin Weigh-Off at Hicks Nurseries? We'll find out.
Download File - 37.0 MB
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Meet The Balloonatics
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Author: ScienceFriday.com
Fri, Nov 18, 2011
The Macy's Thanksgiving Day Parade balloons are getting their final checkup before their big day. John Piper and Jim Artle spill the secrets of inflation, explain how to calculate whether your balloon will float, and explain why the balloons look better after a little time in the sun.
Download File - 34.0 MB
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When Is A Moth Like A Hummingbird?
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Author: ScienceFriday.com
Friday, Nov 04, 2011
A hawk moth feeds by hovering in front of flowers and slurping nectar through a proboscis, basically a body-length straw. To understand how these moths keep such a precise position in the air, Tyson Hedrick, a biomechanist at the University of North Carolina at Chapel Hill, tried destabilizing moths in a variety of different ways and tracked their responses using high speed cameras.
Download File - 42.7 MB
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Desktop Diaries: Brian Greene
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Author: ScienceFriday.com
Friday, Oct 28, 2011
Theoretical physicist and mathematician Brian Greene takes us into his home office for a tour of his tidy workspace, in the second of Science Friday's Desktop Diaries series. Greene uses his desk mainly for calculations, often executed with pencil and paper--a tradition that dates back to his childhood when his father would give him 30-digit by 30-digit multiplication problems. Greene's father, Alan Greene, was a composer, and his music features in this video.
Download File - 21.2 MB
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Geek My Pumpkin
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Author: ScienceFriday.com
Friday, Oct 21, 2011
Carve first, scoop later--that's just one of the tips from Maniac Pumpkin Carvers Marc and Chris. Based in Brooklyn, these professional illustrators switch to the medium of pumpkin during October. They carve hundreds of pumpkins each fall, which go for a few hundred bucks and rarely end up on stoops.
Download File - 43.2 MB
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3D Up In Flames
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Author: ScienceFriday.com
Friday, Oct 07, 2011
Tadd Truscott and Dale Tree, engineers at Brigham Young University, are videoing fire with high speed cameras to try to make a 3D reconstruction of a flame. Poetic and practical, they say: quantifying flames could help us burn fuel more cleanly and efficiently.
Download File - 20.2 MB
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This Dome Is A Home
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Author: ScienceFriday.com
Friday, Sep 30, 2011
Kevin Shea lives in a 70-foot in diameter, forest-green, geodesic dome. It is equipped with a solar array, a wind turbine, and a geothermal system. Shea makes biodiesel in a shed outback. His garden is constructed of 800 old tires. Take a tour of Shea's dome home.
Download File - 18.8 MB
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Purifying Water With Pond Scum
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Author: ScienceFriday.com
Friday, Sep 16, 2011
New York is testing out a new water scrubber at one of its wastewater treatment plants in Queens. Meet the algal turf scrubber--two 350-foot slides covered in green algae. Water flows down the slides, algae grows naturally, and then cleans the water sent over it.
Download File - 18.8 MB
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Stalking The Wild Mushroom
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Author: ScienceFriday.com
Friday, Sep 09, 2011
From death caps to puffballs, the fruiting bodies of fungi can be grouped into about a dozen major categories. Mycologist Roy Halling walks us through the wide world of mushrooms and takes us on a fungi foraging foray on the grounds of the New York Botanical Garden.
Download File - 47.0 MB
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Stroke Of The Water Strider
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Author: ScienceFriday.com
Friday, Aug 26, 2011
Water striders don't really stride, they row on the water. But their legs are spindly and don't seem good for paddling. To find out exactly how water striders propel themselves mechanical engineer David Hu, of Georgia Tech, filmed them rowing on food coloring and built his own robostrider.
Download File - 24.2 MB
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Poop And Paddle
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Author: ScienceFriday.com
Friday, Aug 19, 2011
Green builder Adam Katzman wanted to experiment with building a “constructed wetland” to process sewage. Then he wanted to make the whole thing float. His paddle-boat-toilet, parked at a marina in Queens, demonstrates how rainwater and human waste can be converted to plants and clean water. It’s a zero-waste waste disposal system.
Download File - 28.3 MB
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Boost Your Bike
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Author: ScienceFriday.com
Friday, Aug 12, 2011
Maxwell von Stein, a 22 year-old Cooper Union graduate, built a bicycle that uses a flywheel to store energy. Instead of braking, he can slow the bicycle by transferring the kinetic energy from back wheel into the flywheel--which spins between the bars of the frame. Then Max can send the flywheel energy back to the wheel when he wants a boost.
Download File - 21.0 MB
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Where's The Octopus?
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Author: ScienceFriday.com
Friday, Aug 05, 2011
When marine biologist Roger Hanlon captured the first scene in this video he started screaming. He studies camouflage in cephalopods--squid, octopus and cuttlefish. They are masters of optical illusion and these are some of Hanlon's top video picks of the animals going in and out of hiding.
Download File - 33.8 MB
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Tending Crops On A Brooklyn Rooftop
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Author: ScienceFriday.com
Friday, July 29, 2011
A rooftop farm in Brooklyn grows vegetables and doubles as a green roof, insulating the warehouse below. Green roofs save money on cooling and heating costs and also retain water, reducing the load on sewer systems. Annie Novak, head farmer and co-founder of Eagle Street Rooftop Farm gives us a tour.
Download File - 18.4 MB
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Engineering Artificial Cilia
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Author: ScienceFriday.com
Friday, July 22, 2011
Cilia--the little hairs that propel a paramecium--flap spontaneously, and will synchronize their movements with neighboring cilia. But exactly why they do this has been hard to pinpoint because cilia are complicated structures. So researchers fabricated knockoffs, with fewer components, to see if they could figure out what drives the waving.
Download File - 6.9 MB
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CFL: Eyesore Or Sight For Sore Eyes
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Author: ScienceFriday.com
Friday, July 15, 2011
Just Bulbs, on New York City's Upper East Side, sells just bulbs. There are 36,000 different kinds of lightbulbs in the store, says owner David Brooks. And although customers regularly rail about how compact fluorescent bulbs are ugly, Brooks argues that they've been unfairly maligned. They come in six color temperatures and a wide variety of shapes and sizes.
Download File - 21.2 MB
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A Compost Guru Shares His Secrets
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Author: ScienceFriday.com
Friday, July 08, 2011
Malcolm Beck was farming organically in the 1950s, and that's how he got into compost. What started out as a little manure pile on his farm became a 40-acre compost-processing business five decades later. Beck sold his company, Garden Ville, but still works there and is constantly experimenting with different fertilizer formulas--from bat guano to earthworm tea.
Download File - 33.3 MB
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How Humpbacks Hunt With Bubbles
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Author: ScienceFriday.com
Friday, July 01, 2011
Humpbacks whales blow bubbles around schools of fish to concentrate them for easier capture. Although this hunting technique, called bubble-net feeding, has been documented for decades, just how whales make the nets wasn't well-understood until now, says biologist David Wiley.
Download File - 26.7 MB
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Young Inventors Soup Up A Wheelchair
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Author: ScienceFriday.com
Friday, June 24, 2011
In the basement of Staten Island Technical High School, a group of students meets regularly to build and invent. Their award-winning wheelchair prototype can spin in circles and has a built-in massage function.
Download File - 19.3 MB
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Lab-Grown Heart
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Author: ScienceFriday.com
Friday, June 10, 2011
Build them the right home and cells will organize themselves into a tissue, says bioengineer Gordana Vunjak-Novakovic. We stopped by the lab to see a little piece of beating heart muscle they grew in the lab and keep in an incubator in the corner.
Download File - 27.0 MB
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Sun Spotting
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Author: ScienceFriday.com
Friday, June 03, 2011
Using the Swedish Solar Telescope, a ground-based observatory, Goran Scharmer and colleagues probe the penumbra--that's the stringy structure around the perimeter of the dark part of a sunspot.
Download File - 18.3 MB
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Tale Of Two Tongues
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Author: ScienceFriday.com
Friday, May 27, 2011
Tongues are important, biologists say. Two recent studies explore tongue design and function--how they are used for lapping by dogs and for nectar retrieval by hummingbirds.
Download File - 12.4 MB
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Desktop Diaries: Michio Kaku
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Author: ScienceFriday.com
Friday, May 20, 2011
Theoretical physicist and futurist Michio Kaku takes us on a tour of his office, where he writes his bestsellers and records his radio shows. The futuristic 1950s TV show Flash Gordon jump-started his interest in science. Watching it as a kid, Kaku realized that it was the problem-solving scientist, not the chiseled crimefighter Flash, who was really the hero.
Download File - 16.9 MB
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Magnified Sun Burns
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Author: ScienceFriday.com
Friday, May 13, 2011
A magnifying glass looks harmless. But combine it with a nice sunny day and you have a weapon of ant destruction and a fire hazard. Even if cheap pyrotechnics isn't your thing, the optics of how this works is relevant to anyone with eyes.
Download File - 15.4 MB
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Rock Stars
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Author: ScienceFriday.com
Friday, May 06, 2011
In 1968, the New Jersey Senate decreed the town of Franklin a geological wonder: "The Fluorescent Mineral Capital of the World." Over 350 different minerals have been found in the area, ninety of which glow brilliantly under ultraviolet light.
Download File - 22.1 MB
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Ant Rafts And Caterpillar Robots
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Author: ScienceFriday.com
Friday, Apr 29, 2011
Drop a clump of fire ants into water and they will assemble into a raft that stays afloat for weeks, according to a new study. In other breaking bug news, researchers are investigating how caterpillars roll away from prey as inspiration for the design of a jointless, soft-bodied robot.
Download File - 13.7 MB
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Candy Corn In Space
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Author: ScienceFriday.com
Friday, Apr 22, 2011
Astronauts are allowed to bring special “crew preference” items when they go up in space. NASA astronaut Don Pettit chose candy corn for his five and a half month stint aboard the International Space Station. But these candy corn were more than a snack, Pettit used them for experimentation.
Download File - 11.4 MB
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