Why do people die in graveyards? How do they make rainbows? Why does God let bad things happen? Why do we look like our mums? What is at the bottom of a black hole? Inspired by the ever popular Uncle Albert trilogy, more and more of you write to Uncle Albert, Professor Russell Stannard, with your mindboggling questions about every subject under the sun. Here from his bulging postbag is a second collection of your letters and Uncle Albert's replies.