Mystery #1Tier 2evolution / adaptation
Why are polar bears white?
Almost every other bear is brown or black, but polar bears, alone on the Arctic ice, are white. That can't be a coincidence. Why did this one kind of bear end up matching the snow so perfectly?
Your guess
What's your hunch about why polar bears ended up white when other bears are dark?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.