Why care for the weak and vulnerable if survival is all that matters? Why are people so concerned with fashions and the labels on clothes? Isn't religion just a matter of being conditioned by your parents? How do we explain the Big Bang? What is love?

Philosopher and theologian Dr Peter Vardy has collected 54 of the best questions about life asked by his young daughters Petra and Thora, attempted to answer them himself and gathered additional answers from leading figures in a variety of fields from across the world.

The Philosophers' Daughters is illustrated by Rabbi Dan Cohn-Sherbok.