About a billion years ago, the first multicellular life existed on our little blue dot. I can understand the unit of measurement known as a ‘billion’ in a mathematical way, but it boggles my mind when speaking of it in terms of years. I suppose that’s because we humans think about years mostly in terms of, or relative to, human history and individuals’ lives. It’s not until you talk about science that you have to consider years beyond the existence of human ones, and the Earth’s geological time is beyond massive. Anyways, it took another 6 or 7 million years for something besides a plant to finally crawl out of the ocean and exist on land. To put that in perspective, modern humans have been around for a mere 200 thousand years. So, for 6.5 million years things have been evolving in the ocean. 6.5 million years of things with sharp teeth, stingers and the ability to breath underwater. (more…)
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