This one-hour program is divided into six chapters. Choose any chapter below and select QuickTime or Windows Media Player to begin viewing the video. If you experience difficulty viewing, it may be ...

(This program is no longer available for online streaming.) Almost a century ago, paleontologists found the first tantalizing hints of a monster even bigger than Tyrannosaurusrex, perhaps the largest ...

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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"Making Stuff" is produced in cooperation with the Materials Research Society (MRS), an international organization of nearly 16,000 materials researchers from academia, industry, and government, and a ...

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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 ...

Editor's Note: On the night of March 24-25, 1944, 76 Allied prisoners of Stalag Luft III, a German prison camp in Sagan, 100 miles southeast of Berlin, escaped through a tunnel named "Harry." Within ...

"The ordinary adult never gives a thought to space-time problems.... I, on the contrary, developed so slowly that I did not begin to wonder about space and time until I was an adult. I then delved ...

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 ...

Tudor Parfitt, the protagonist of the NOVA documentary "Lost Tribes of Israel," made a journey through southern Africa to study the unusual traditions of a black African tribe called the Lemba. This ...