A new report shows that four legged mammals may have come out of the water and on to land much earlier than was previously thought. Some fossilized footprints show four legged creatures on land 397 million years ago. Scientists had originally thought this development occured somewhere around 385 million years ago. The difference is enourmous in scientific terms. It totally changes the notion of how animals evolved, and scientists are being forced to reconsider their thinking. Fully developed theories on the progress of evolution have to be thrown out when this new evidence is considered. Currently, the biggest goal of many researchers is to find more fossilized evidence to support this theory, to be completely sure.
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