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
Political Gabfest
Oct. 31 2014 1:29 PM You, The Gabfest, and a Hotel Room Win tickets to attend a taping of the Political Gabfest, live from David’s Chicago hotel room.