Most sharks are Ecthoterms, cold-blooded fish. The Megalodon was a massive shark that went extinct 3.6 million years ago, and like some shark species, it was not a cold-blooded fish, it could keep its blood temperature about 7 degrees warmer than its surrounding water.
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A fossil of an arthropod from 525 million years ago contained the oldest brain scientists ever discovered. Unlike what was expected, the brain was divided
Diatoms are single-cell algae, which create 20%-50% of the oxygen on earth. Ocean acidification causes the silica shell to melt slower, making them sink to
The oldest heart in the world, aged 380 million years, was found preserved inside a fossilized extinct fish. The fish, known as Gogo, was found