Images Dated 22nd July 2003
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Featured 22 Jul 2003 Print
Coloured MRI scan of healthy human head in profile
Human head. Coloured magnetic resonance imaging (MRI) scan of a sagittal (profile) section of a healthy human head. The soft tissue of the lips, nose and skin appears dark blue. The jaw can be seen at lower left, with a tooth (pink) visible at lower centre. The curve of the skull is seen at upper right. MRI uses pulses of radio waves to provoke atoms in the body to release signals. The signal strength depends on the type of tissue, so an image can be built up of the internal features. This makes it a very useful tool when trying to diagnose a condition without performing exploratory surgery
© MEHAU KULYK/SCIENCE PHOTO LIBRARY
Featured 22 Jul 2003 Print
Losh and Stephensons carriage
Losh and Stephenson's carriage. Historical artwork of a steam locomotive patented in 1815 by engineer George Stephenson (1781-1848). This design had connecting rods to drive the wheels and wheels coupled together with a chain. It was the first to have a steam-blast, which creates a draft to keep the fire going in the furnace. Stephenson's locomotives were built at William Losh's ironworks in Newcastle. The pair patented cast iron railroads in 1816, but parted company in 1823 when Stephenson decided that malleable iron railroads were better. Published in History and progress of the steam engine, England, 1830
© SCIENCE, INDUSTRY & BUSINESS LIBRARY/NEW YORK PUBLIC LIBRARY/SCIENCE PHOTO LIBRARY
Featured 22 Jul 2003 Print
Earliest recording of a European meteorite
Earliest recorded European meteorite. Medieval manuscript page which is the first to record a meteorite (shown in woodcut image at top). It fell near Ensisheim, a town in Alsace which is now in France, on the morning of 7 November 1492. The "thunderstone" was interpreted as a sign of God's anger. It is thought that the meteorite weighed almost 130 kilogrammes (kg), of which a 55 kg mass remains. The meteorite was a stony chondrite type; chondrites make up about 86% of the solar system's meteorites. About 500 meteorites hit Earth each year, but most fall in the sea or remote regions & go unrecorded. Meteorites were not widely accepted as having an extraterrestrial origin until 1803
© D. VAN RAVENSWAAY/SCIENCE PHOTO LIBRARY
