Mystery #2Tier 2Earth / space
Why is summer warmer than winter?
It seems obvious that summer must be when Earth is closest to the Sun. But here's the twist: when it's summer for you, it's winter on the other half of the planet at the very same time, and Earth is slightly farther from the Sun during northern summer. So if it isn't distance, what makes summer hot?
Your guess
What's your hunch about what really makes summer warmer than winter? (Careful: it isn't being closer to the Sun.)
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.