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Crunch point

16 February 2002

Lostworlds

24 November 2001

Red, willing and able

27 January 2001

The last supper

13 November 1999

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