Images Dated 15th April 2004

Formula One World Championship: Pole sitter Ayrton Senna McLaren, who retired from the race on lap 38 with an electrical problem, gives his

(L to R): Pole sitter Ayrton Senna (BRA) McLaren, who retired from the race on lap 38 with an electrical problem, gives his race winning team mate Gerhard Berger (AUT) a lift to the circuit on a moped.
Canadian Grand Prix, Rd 7, Montreal, Canada, 14 June 1992

© Sutton Motorsport Images

Basking Weddell seal

Weddell seal (Leptonychotes weddelli) basking in the summer sun near the Antarctic Peninsula. Weddell seals are found near the fast ice of the Antarctic continent and some nearby islands. They grow to a length of 3 metres and can weigh up to 450 kilograms. The females are usually bigger than the males. Weddell seals remain under the ice during the winter months, and breath through holes they create in the ice with their teeth. They have well-developed eyesight that allows them to locate the breathing holes in low visibility. Their eyesight also allows them to feed in low light conditions and they use their whiskers to assist in finding food

© DAVID VAUGHAN/SCIENCE PHOTO LIBRARY

Mummified foot resting on DNA autoradiograms

Mummy's foot. Close-up of the foot of an Egyptian mummy on autoradiograms. The autoradiograms are X- ray prints made from DNA extracted from the foot. DNA (deoxyribonucleic acid) is the molecule responsible for carrying the genetic code. It holds the code as a series of pairs of bases along the length of the molecule. The dark bands on the autoradiogram represent the positions of specific bases in the DNA, and thus the genetic code. This "DNA fingerprint" is different for every individual, and familial traits can be traced by studying it. Taking DNA from preserved humans gives a good account of how humans spread across the world from the point of their evolution

© VOLKER STEGER/SCIENCE PHOTO LIBRARY