NOVA

自然 · 历史

S18 E7 Killing Machines

本集简介

Robotic weapons that seek out and destroy ships, planes, and other targets are the wave of the future. NOVA questions whether their proliferation may spell an end to superpower invincibility.

上一集

1990/11/06 S18 E6

Earthquake!

NOVA looks at the high-stakes quest to predict earthquakes. Despite past disappointments, geologists still hope to divine the clues that precede nature's ultimate upheavals. Narrated by Avery Brooks.

下一集

1990/11/20 S18 E8

Can the Elephant Be Saved?

Is the ivory ban in the elephant's best interest? NOVA looks at the controversial strategies to save the world's largest land animal from extinction.

当前季

S18

1990-10-03

哇，窗口太小啦

NOVA