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3:20
See why an explosion three miles above Earth would act like a hot tornado on the surface.
1:07
Author and physicist Brian Greene answers questions from Facebook and Twitter.
5:09
China is ramping up production of solar technology but coal power remains king.
1:23
Tom and Ray test the waters of Iceland's Blue Lagoon while filming "Car of the Future."
1:31
If an elevator falls, can you save yourself by jumping up at the last second?
2:42
Hotels are offering an innovative way for observant Jews to use elevators on the Sabbath.
2:58
Saul Griffith has put himself on a strict regime to reduce their carbon footprint.
2:29
One World Trade Center's glass facade may look fragile, but it is extraordinarily tough.
2:49
Bracing One World Trade Center's steel frame led to some unexpected perks at the worksite.
1:48
Developer Larry Silverstein explains what's different about the new 7 World Trade Center.
