QUESTIONS
Q : Can spiders smell?
Louise Westwood, Birmingham.
Q : When you draw a bow, what muscles are used?
Aiden Taylor, Keele, Staffs.
Q : If sapphires and rubies are scientifically the same stone (corundum), how is a pink sapphire — the gem in Princess Eugenie’s engagement ring — distinguished from a ruby?
T. Nicholls, Basildon, Essex.