Who is the greatest genius?

In the Summer issue of BBC Focus Magazine, we're asking you to choose your top genius of all time. But before you vote, read more about the 15 nominees.

BBC Focus Magazine Subscription

How to save money with science

As the credit crunch squeezes every penny we earn, Luis Villazon looks to science for the best ways to save money on your food, home life, entertainment, nights out, love, transport and holidays.