Jellyfish Invasion

S04 E01 • Wednesday, Aug 8, 2007 • Aug 8

Science des chiens

S04 E02 • Wednesday, Aug 15, 2007 • Aug 15

Ultimate Crocodile

S04 E03 • Wednesday, Sep 12, 2007 • Sep 12

Science of Babies

S04 E04 • Wednesday, Sep 19, 2007 • Sep 19

Mammoth Mystery

S04 E05 • Sunday, Oct 7, 2007 • Oct 7

Inside the Body Trade

S04 E06 • Sunday, Nov 11, 2007 • Nov 11

Ultimate Viper

S04 E07 • Wednesday, Nov 21, 2007 • Nov 21

China's Secret Mummies

S04 E08 • Sunday, Dec 2, 2007 • Dec 2

In China, archaeologists unearth ancient mummies with European facial features, blond hair and blue eyes. Where did these Caucasians come? Four bodies, a scattering of clues, a mystery whose solution could rewrite history. National Geographic Explorer-in-Residence Spencer Wells, opens an ancient case of missing persons, using the latest advances in DNA technology to determine the origins of a group of enigmatic mummies found in western China. What he learns may change what we know about the world. The four individuals were part of a vanished world that existed in western China between 2600 and 4000 years ago - long before Marco Polo or the Silk Road. Yet these long-buried corpses look European and were found with tools that didn't exist yet in that part of the world. Who were they? Where did they come from? And how might they have affected the spread of culture and technology in prehistoric times?

Last Christians of Bethlehem

S04 E09 • Sunday, Dec 9, 2007 • Dec 9

Science of Evil

S04 E10 • Wednesday, Jan 9, 2008 • Jan 9 • 1h

Testosterone Factor

S04 E11 • Wednesday, Feb 13, 2008 • Feb 13

Alaska's Last Oil

S04 E12 • Wednesday, Mar 12, 2008 • Mar 12

Shark Superhighway

S04 E13 • Tuesday, Apr 8, 2008 • Apr 8

Tunnel to a Lost World

S04 E14 • Tuesday, Jun 3, 2008 • Jun 3

Bog Mummies

S04 E15 • Wednesday, Jun 4, 2008 • Jun 4

Science of Cats

S04 E16 • Tuesday, Jun 10, 2008 • Jun 10

Gorilla Murders

S04 E17 • Tuesday, Jul 1, 2008 • Jul 1

Finding Anastasia

S04 E18 • Tuesday, Apr 29, 2008 • Apr 29

Did Romanov Princess Anastasia survive a Bolshevik firing squad or did she and her brother Crown Prince Alexis perish with their father, Tsar Nicholas II, before another firing squad in 1918? The chance find of human remains in a Siberian forest brings forensic anthropologist Dr.Anthony Falsetti to in search of the truth. Marshalling DNA, ballistics and the very latest forensic analysis, an international team works to dispel the greatest myth of the 20th century and tell a real story more remarkable than any fiction.