Ever wonder what the very first animal on Earth was? Scientists believe they’ve finally figured it out, and it’s not what you’d expect! It wasn’t a dinosaur or a giant sea creature—it was a simple, jelly-like organism called a comb jelly. These tiny, shimmering creatures existed over 500 million years ago and paved the way for all animals today. What’s mind-blowing is how their simple bodies and nervous systems can still teach us about evolution.

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