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Video: Big Bang breakthrough explained with a towel and an apple

Two-minute explanation of this week’s announcement about gravitational waves and the Big Bag – using a towel, an apple and a ping pong ball.

Watch ‘father of inflation’ learn of gravitational waves discovery

Professor Andrei Dmitriyevich Linde is one of the main authors of the inflationary universe theory that was confirmed this week. Watch his emotions as assistant Professor Chao-Lin Kuo surprises him with the news of the evidence that supports cosmic inflation theory. The discovery, made by Kuo and his colleagues at the BICEP2 experiment, represents the first images of gravitational waves, or ripples in space-time. These waves have been described as the “first tremors of the Big Bang.”

What is a pulsar?

Today’s FAQ: What is a pulsar?

A pulsar is a rapidly spinning neutron star which is the small, incredibly dense remnant of much more massive star. A teaspoon of matter from a neutron star weighs as much as Mount Everest. This cool video from NASA Astrophysics explains it well.

Video: Bill Nye tells how the Science Guy came to be

Bill Nye uses the unlikely pairing of Steve Martin and Carl Sagan as role models to become “the Science Guy.”

A telescope bigger than a galaxy

Astronomers have figured out how to use the gravity of distant galaxies to bend light and magnify images, forming gigantic telescopes that see deeper into the cosmos than ever before.

Bald eagle nest cam 24/7

Live streaming video by Ustream

Millions of people have been watching the live web view of the baby eaglet – named B3 – that hatched February 22, and his two parents, thanks to the bald eagle nest cam from Georgia’s Berry College.

Cosmos is coming Sunday night

If you watch this three-minute long trailer for the new Cosmos without wanting to tune in to the whole series … you are made of sterner stuff than me.

You’ve gotta see the chain fountain video

Steve Mould, a host of science television shows in the UK, stumbled on the chain fountain while he was looking for a way to demonstrate something else. Mould, who has a master’s degree in physics from Oxford, discovered a rising curve in a moving chain of beads as the beads flow out of a container. Once he starts it, the bead chain keeps going, like water or gasoline being siphoned from a tank. Why?

Shark studies go electronic

Scientists at the University of Hawaii and University of Tokyo are gaining new insights into the movements and behaviors of sharks using video cameras and sensors attached to the animals. They’ve also started a project that examines eating habits of sharks and other top ocean predators like tuna using small instruments, electronic pills, that can be ingested by the creatures.

Watch March come in like a lion over eastern U.S.

Satellite video captures the awesome power of the winter storms that hit the eastern U.S. on the first days of March.