Scientists revealed first animal on Earth : For years, sea sponges were widely regarded by many scientists as the earliest animals to have evolved on Earth. But in 2009, a new analysis challenged that long-held view, suggesting that tiny, amoeba-shaped marine creatures known as placozoans may be even closer to the base of the animal tree of life.
The findings suggested these simple multicellular organisms, found on rocks and corals in temperate seas, may sit closer to the base of the animal tree of life than sea sponges, as per a report.
