Watch ‘father of inflation’ learn of gravitational waves discovery

Physicist Andrei Dmitriyevich Linde is one of the main authors of inflationary universe theory. Watch his emotions as he learns his theory was proven true this week.

Overgrazing by deer is changing the face of U.S. forests

Deer's natural predators, wolves, have been exterminated. Today, overgrazing by deer in hugely multiplied numbers is affecting forests.

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."

Do microbes spoil food to avoid sharing?

Don't enjoy your fruit with a coating of slime and fur? Fine then, that just leaves more for the microbes.

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.

The chain fountain video is amazing

It's looks like a magic trick, but it's really a problem in the physics of everyday things.

Another asteroid flies through Earth-moon system on Thursday

For the second time in two days, an asteroid is sweeping safely through the Earth-moon system. How to watch online.

Where in the U.S. you’re most likely to be struck by lightning

One moment you're strolling across the golf course. The next moment your body is wracked with the searing pain of 50,000 degrees Fahrenheit.

Lightning, seen from space

NASA routinely studies lightning space to aid in weather forecasting. A new instrument is being planning for a 2016 launch.

Watch online as asteroid sweeps within moon’s distance today

Watch online as asteroid 2014 DX110 sweep closer than the moon on Wednesday, March 5.