## logic gate

The story of George Boole is an extraordinary example of collaboration across the centuries.

A closer look at one of the simplest quantum algorithms.

**Yutaka Nishiyama**illuminates the connection between light bulbs, logic and binary arithmetic.

**John Conway**believes they are going to want to talk mathematics. He talks to

*Plus*about his

*Life*game, artificial life and what we will have in common with extraterrestrials.