NOVA

These Boulders are Alive

Clip: Season 42 Episode 21 | 2m 48s

Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.

Aired: 11/11/15

Rating: NR

Problems Playing Video?

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting and PBS viewers.