When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Hannah Osborne is the planet Earth and animals editor at Live Science. Prior to Live Science, she ...

Think you know your animals? Put your knowledge to the test with our challenging quiz, which covers both exotic and local species. If you can identify which creature changes its colour to blend into ...

We don't know exactly when the first animals on Earth appeared, but it's thought to be around 700 million years ago. Around 541 million years ago, at the start of the Cambrian period, hundreds of ...