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? | Closed Captioning

National corporate funding for NOVA is provided by <a href="http://www.draper.com/" target=_blank">Draper</a>. Major funding for NOVA is provided by the David H. Koch Fund for Science, the <a href="http://www.cpb.org/" target="_blank">Corporation for ...