Images Dated 26th March 2004

Cats on window sill

Cats on window sill, thermogram image. These are domestic cats (Felis sylvestris). The colours show variations in temperature. The scale runs from white (warmest), through yellow, orange, red and purple to blue (coldest). Thermography records the temperature of surfaces by detecting long- wavelength infrared radiation. The hot radiator (at bottom) shows up as bright yellow/white

© TONY MCCONNELL/SCIENCE PHOTO LIBRARY

Aviation monument

Aviation monument commemorating the British Fairey F-3 seaplane that made the first flight across the South Atlantic from Lisbon, Portugal to Brazil, in March-June of 1922. Two Portuguese naval officers (Coutinho and Cabral) flew a total of three F-3 seaplanes during the journey. Fuel limitations and mechanical problems required stops for repairs and fuel at remote Atlantic islands. Out of sight of land, they navigated using a sextant that had been specially designed for airplane use. Their first seaplane, the Lusitania, sank after a rough landing. They completed the journey in the Santa Cruz which replaced the Lusitania's replacement, the Portugal. Photographed in Lisbon, Portugal

© SHEILA TERRY/SCIENCE PHOTO LIBRARY

Stent graft in artery, CT scan

Graft in artery. Coloured computed tomography(CT) scan of a stent graft (red) in the aorta of apatient after the repair of an abdominal aorticaneurysm. An aneurysm is the swelling of part ofan artery due to a weakness in its wall. Theswelling fills with blood and may rupture, withfatal consequences, if left untreated. Treatmentinvolves removing the weakened part of the arteryand replacing it with an artificial graft, whichis held open by a splint-like stent. This aneurysmoccurred in part of the aorta (the main artery ofthe body) in the abdomen. CT scans use X-rays toconstruct images of parts of the body

© Gjlp/Science Photo Library