A truly enormous ichthyosaur around the size of a modern sperm whale, reached its size within just a few million years of taking to the water - a blink of an eye in evolutionary time.
We learn why all mammals today, from humans to bats, have five fingers or fewer.
The giant pterosaur's occupied the empty Hateg Island.
Only a few million years ago, Hyenas lived very different lives from what we know today.
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