If you’re an aspiring paleontologist, you’ll want to pay attention to this! A recent study has identified microfossils from the early Cambrian period, estimated to be between 540 and 520 million years ago. These microfossils, which are thought to be some of the earliest fossilized animals, were found to have introvert musculature. This means that they had muscles that could contract, allowing them to move and actively search for food. This discovery not only provides insight into the evolution of animals, but also provides evidence that complex muscles existed much earlier in the evolutionary timeline than was previously thought. This is an exciting development in the field of paleontology and will undoubtedly lead to further research and discoveries!

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source: Phys.org