Would a mirror lightyears away in space show us our planet's ancient history?
If an asteroid wiped out the dinosaurs, but birds are dinosaurs, what the heck is going on?
Why don't you get thrown backwards when you switch on your torch? Kerstin Göpfrich found out from Dr Anna Lombardi.
Listener Loot asked how the Moon got its markings, so we looked to the sky for an answer.