Images Dated 22nd October 2003

F/A-22 Raptor sits on the parking ramp

Nellis Air Force Base, Nevada, October 22, 2003 - A F/A-22 Raptor sits on the parking ramp. The F/A-22 is a new breed of super-fighter for the 21st century and is the first aircraft with the ability to fly at supersonic speeds without afterburners

© Stocktrek Images

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Subreflector of upgraded Arecibo radio telescope

Arecibo subreflector system. View of the 90-tonne dome housing the new gregorian subreflector system installed in 1997 for the Arecibo radio telescope. Note the people at upper right. This largest radio telescope in the world is situated in a natural crater in the mountains of Puerto Rico. The new subreflector system with two mirrors is suspended 130 metres above the fixed dish. It can send and receive signals to examine planets & asteroids, & also analyse Earth's upper atmosphere. To scan the sky the dome is steered above the 305m dish. The Arecibo upgrade includes a 16m high buffer screen around the dish and a new radar transmitter that increases Arecibo's power by 20 times

© DAVID PARKER/SCIENCE PHOTO LIBRARY

Leonardo da Vincis oak leaves and acorns

Oak leaves and acorns. Historical artwork of the leaves and fruit (acorns) of the oak tree (Quercus robur). Also seen at left are the leaves and pods of the Dyer's woad plant (Isatis tinctoria). Drawn by the Italian artist, engineer and scientist Leonardo da Vinci (1452-1519), with red chalk

© SHEILA TERRY/SCIENCE PHOTO LIBRARY

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