(This program is no longer available for online streaming.) The centuries-old tradition of folding two-dimensional paper into three-dimensional shapes is inspiring a scientific revolution. The rules ...

When it comes to sweets, the verdict has long been in: Overindulging can really mess with your body. Eating too much sugar boosts your chances of succumbing to heart disease, diabetes, obesity, ...

Few attributes of being human have attracted more intense thought than the simple fact that, unlike all other living mammals, we walk upright on two legs. Human bipedalism represents a major ...

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1. Katrina makes landfall in Louisiana at 6:10 a.m., but the flooding of residential areas in greater New Orleans actually begins an hour and a half earlier. Between 4:30 and 5 a.m., levees located ...

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It's a hifalutin title, but that's what this feature offers—in a capsule version, of course. Our time line stretches from the big bang some 10 to 20 billion years ago to the time 10 100 years in the ...

Over 2,700 years ago, the Assyrians exiled the ten tribes of the Kingdom of Israel. The ten tribes would have returned at once to the Holy Land had not the Lord encircled them with the legendary river ...

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The Queen Bee, the first returnable and reusable UAV, was designed for use as an aerial target during training missions. Anti-aircraft gunners in the Royal Navy practiced shooting them down at first ...

Unearthing our earliest ancestors.Nothing is more fascinating to us than, well, us. Where did we come from? What makes us human? An explosion of recent discoveries sheds light on these questions, and ...

At 146.5 m (481 ft) high, the Great Pyramid stood as the tallest structure in the world for more than 4,000 years. Today it stands at 137 m (449.5 ft) high, having lost 9.5 m (31 ft) from the top.