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.

Discover the Animal That Can Live 10,000 Years - A-Z Animals

Timeline of the evolution of life on Earth

Earth's first animals may have been sea sponges, Science

12 Oldest Animal Species on Earth

See SpongeBob SquarePants' and Patrick Star's Real-Life Twins, Smart News

Failure Rates Of Repaired Bucket-Handle Tears Of The Medial

What did the earliest animals look like?

Scientists find 'exquisite' 515-million-year-old fossilized

Coral Reef With Great Yellow Sea Sponge At The Bottom Of, 57% OFF

World's Largest Sea Sponge, world record in Hawaii