Andy Hobsbawm shares a fresh ad campaign about going green -- and some of the fringe benefits.

Forget about the hybrid auto -- Shai Agassi says it's electric cars or bust if we want to impact emissions. His company, Better Place, has a radical plan to take entire countries oil-free by 2020.

A look at sustainable energy and what we use our energy for.

Overfishing is the depletion of a stock of fish (in a body of water) by too much fishing. Many people are unaware of the scary facts behind the fish we eat. This animation creates much needed awareness about the ocean's most solvable problem while reminding us that we all have a role to play in fixing it.

On January 28, 1986, NASA Challenger mission STS-51-L ended in tragedy when the shuttle exploded 73 seconds after takeoff.  On board was physicist Ronald E. McNair, who was the second African American to enter space. But first, he was a kid with big dreams in Lake City, South Carolina.

Did you know that archaeological excavations are like gigantic jigsaw puzzles?  Use the recent discovery of King Richard III to understand how. Through careful examination of old maps, painstaking archaeological exploration, and use of good science, archaeologists piece together the puzzle to share their amazing discovery of England's famous King ("my kingdom for a horse") with the world.

The images in this video come from Chauvet Cave, an ancient rock art site in France.  Watch the video and try to imagine the kind of people that created the art.  There are no words in this video, so check out the Dig Deeper section for some context before you try to answer the questions. 

Orly Wahba is here to talk to us about the magic of kindness. As a middle-school teacher, she wanted to make a difference in the life of her students, so she designed “Act of Kindness” cards. These super-simple cards contained directions such as “open the door for someone” or “invite someone to have lunch with you,” along with an instruction to pass on the card once you were done. She wanted her kids to see the ripple effect of kindness.

At the 2010 NFL draft, NFL Network anchor Rich Eisen was dared to run the 40-yard dash. The 40-something  reporter in a suit was no match for the 22 year old NFL draft prospects. Eisen's colleagues put together this segement mocking his inability to outrun even the largest draftees.

Good morning, Twitter! Millions of tweets are sent everyday, and from these tweets, we can gather a lot of information about people’s lives: where they travel, when they wake up, and their opinions on pretty much everything. In this TEDYouth 2012 Talk, former New York Times data artist-in-residence Jer Thorp imagines what uses we can devise from this wealth of information.

When the founders of the United States gathered to create the foundations of the country, they decided on three branches of government, with a president central to the executive branch. Kenneth C. Davis explains why this decision was not necessarily inevitable and what variables were up for debate.

After Rome was destroyed, people were wary of attachment to physical beauty. As Christianity gained traction, Romans instead began to focus on the metaphysical beauty of virtue, and art began to follow suit.  James Earle discusses how Medieval paintings of Madonna were affected by this shift.

An unbelievable play on an American football field is the perfect backdrop for understanding crucial physics concepts. Michelle Buchanan goes play-by-play on the vectors, the scalars, and the glory of a downright scientific touchdown.