Did all animal life on Earth begin with a sea sponge?

Genetic analysis of 640-million-year-old rocks suggests that the sea sponge may have been the first animal to develop on Earth.

Scientists discover traces of world's oldest sponge - The Johns Hopkins News-Letter

Coral Reef With Great Yellow Sea Sponge Underwater Stock Image

Geologist may have found 890-million-year-old sea sponges in ancient reefs of Canada's Mackenzie Mountains - ABC News

Sea sponges could save our lives, if we don't destroy them first - Vox

Sponge-like fossil could be Earth's earliest known animal

Timeline of the evolution of life on Earth

Coral Reef With Great Yellow Sea Sponge Underwater Stock Image

Failure Rates Of Repaired Bucket-Handle Tears Of The Medial

Amazing facts and secrets of sea sponges

Sea sponge - Branson's Wild World

Marine Sponges — The Marine Diaries

Coral Reef With Great Yellow Sea Sponge Underwater Stock Image