NOVA

自然 · 历史

S27 E10 Secrets of Lost Empires: Medieval Siege

本集简介

Two teams set out to build precise replicas of a fearsome medieval weapon—the trebuchet.

上一集

2000/01/18 S27 E9

Lost on Everest

The program chronicles a successful 1999 NOVA expedition to investigate the mysterious disappearance of George Mallory and Andrew Irvine high on Everest in 1924. During this expedition, which included a NOVA/PBS Online Adventure, Mallory's body was found, though the mystery only deepened.

下一集

2000/02/01 S27 E11

Diamond Deception

Makeshift labs in China and Russia are turning out synthetic gemstones that rival natural diamonds.

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