The Economic Times

In 2009, scientists revealed which animal came first on Earth, and the answer was right at the bottom of the sea

Scientists revealed first animal on Earth: Emerging research proposes that placozoans could be the oldest animals on Earth, reshaping the established perception of sea sponges as the earliest fauna. Scientists have discovered that placozoans are situated earlier on the animal evolutionary tree. This discovery invites a fresh perspective on the origins of nervous systems in the animal kingdom.