Extras

NOVA

Kryptonite for Sharks

Clip: S39 Ep6 | 6m 48s

Marine biologist Patrick Rice is using rare earth elements to repel sharks.

NOVA

Hunting the Elements Preview

Preview: S39 Ep6 | 4m 10s

A two-hour special from the producers of "Making Stuff"

NOVA

Elemental Bloopers

Clip: S39 Ep6 | 2m 46s

Watch David Pogue's hilarious out-takes from NOVA's "Hunting the Elements."