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 ...

A new quiz will test your knowledge of the animal kingdom - and it's a lot harder than you might think. Dare to take a stroll on the wild side with this challenging quiz, testing your knowledge of ...

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 ...