Meteor or meteorite? Did one, or the other, really kill the dinosaurs? Why do you almost never see a meteorite as it falls? Was a dog really killed by a Martian? Rocks from the Moon and Mars: how do we know? And how do we know how long they took to get here? These and other intriguing questions will be answered by Ulster Museum’s meteorite expert Dr Mike Simms, or you can ask your own.