While many in the scientific community were close to certain that simple lifeforms like sponges were the first living creatures on earth, several studies have uncovered evidence that the original sinners were more likely the Placozoans, tiny multi-cellular organisms about a millimeter long that are known for their lack of complex biological systems, quick wit, and warm hospitality.
A Placozoan sort of looks like… a sponge.
A study conducted by scientist Rob DeSalle confirmed conjecture that animal evolution is not a single sequence of occurrences, but in fact a multipronged progression. The discovery that the precursors of a nervous system in Placozoans and other lower lifeforms (invertebrates such as jellyfish) differ in their development from those found in higher ones shows that such systems may have evolved many times over in various groups of animals. According to DeSalle, systems and organs including the eye, the stomach, and the spine have evolved many times over in varying forms.
Buddy Up