Is SpongeBob Our Oldest Ancestor? Sea Sponges May Have Played A 'Key Role' In Evolution Of Life On Earth

It's difficult to imagine that man could have evolved from an organ-less, multicellular sponge. Then again, that's what hundreds of millions of years of natural selection will do to a species. According to a new study, published in the journal Nature Geoscience, we can thank our square-pants friend from Bikini Bottom for paving the way for more complex life on Earth.