Scientists in Australia may have discovered the oldest animal fossils ever found. These sponge-like creatures are suggested to be around 650 million years old, which is almost 70 million years more than the preexisting record. The fossils were found under 635 million year old glacial deposits. This changes how geologists thought when the first animals appeared on Earth. The oldest known sponges prior to this finding were 520 million years old.
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