The quest is on to find out how something can appear to roll up a hill, rather than down. Plus, we ask if the moon appears the same to viewers on either side of the planet. Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Does everyone see the same phase of the moon?

Each week we set out to solve one of the world's weirdest, wackiest, funniest and funkiest scientific puzzles. And along with the answer there's a brand new question to think about for next time...