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The African queen

10 September 1999

The Martians in your kidneys

20 August 1999

They said they were too small even to exist, but that doesn't mean they can't make you ill . . . Nell Boyce peers into the bizarre world of mini-bacteria

The riddle of the sands

9 July 1999

Deep in the Sahara lie vast deposits of incredibly pure glass. Nothing on Earth could have created them. Giles Wright investigates

The twilight zone

7 May 1999

Deep secrets

16 October 1998

Queen of the night

7 August 1998

Supernova

17 April 1998

Seven planets for seven stars - Just as astronomers were losing all hope, new worlds beyond the Solar System have started to turn up, says Gabrielle Walker

14 June 1996

Meteorites – the children of the asteroids

10 February 1996

Next week, a spacecraft should set off on a three-year journey to a lump of flying rock the size of a city. The Near Earth Asteroid Rendezvous (NEAR), scheduled for launch by NASA on 16 February, will be the first mission to study an asteroid

Fighting fire with fire

14 July 1995

If we are going to stop the planet from turning into a giant tinderbox, we have to learn how to use fire at least as well as our ancestors