The Humblest of Sea Creatures Helped Life Rise on Earth

Slate in motion.
March 19 2014 3:40 PM

Sponge of Life

We may owe our existence to the sea sponge.

Sponges are filter feeders with no sophisticated digestive system, a consumption method that absorbs less oxygen—and may have made the squishy creatures central to early life on Earth. 

Paca Thomas is a regular video contributor to Slate.

  Slate Plus
Slate Picks
Nov. 21 2014 1:38 PM What Happened at Slate This Week? See if you can keep pace with the copy desk, Slate’s most comprehensive reading team.