A lot of scientists think that the very first living things on earth were microbes. Micorbes are tiny creatures that are so small you can only see them with a microscope.
Random fact: did you know that some microbes travelled to the moon? They were on a camera probe that was sent in to space. They survived launch, freezing temperatures and a space vacuum and just hung out on the probe for 3 years. I think that’s pretty cool. Microbes on the moon
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