Why did they have seasons? Well... it obviously had something to do with the way the earth tilted towards the sun, since that was the answer everyone was giving. Was there even any point to his contributing? Mo frowned hard at his feet peeking out from the side of the desk, since he wasn't sitting properly in order to avoid falling over.

The desks were tilted. Like the planet.

"How do other planets have seasons if they aren't on a tilted axis, though?" Oh, oops... this wasn't Q&A time. Mo clapped a hand comically over his mouth and made apologetic eyes at the professor.