## Articles

God created the integers, all the rest is the work of man.

**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.

**Tom Körner**speculates on the historical reasons why computers were invented when they were.

**C. J. Sangwin**shows us how eighteenth-century mathematician Leonhard Euler solved one of the foremost infinite series problems of his day.

**Paulus Gerdes**takes us on a tour of the mathematical properties of some beautiful designs inspired by the traditional art of Angolan tribespeople.

*Plus*talks to

**Sir Roger Penrose**about all this and more.

**Sir Martin Rees**gives

*Plus*a whistlestop tour of some of the more extraordinary features of our cosmos, and explains how lucky we are that the universe is the way it is.