Images Dated 1st September 2011

DNA Double Helix with Autoradiograph

Conceptual computer illustration of the DNA double helix together with a graphic representation of an autoradiograph display. The pattern of the DNA autoradiograph bands is unique to each individual, but some bands are shared by related people, such as a parent & child. DNA fingerprints can be used to prove conclusively whether people are related. The double-helix model of DNA structure was first published in the journal Nature by James D. Watson and Francis Crick in 1953, based upon the crucial X-ray diffraction image of DNA labeled as "Photo 51", from Rosalind Franklin in 1952. The structure of a double-helix elucidated the mechanism of base pairing by which genetic information is stored and copied in living organisms. Genetic fingerprinting and DNA profiling was developed by Dr. Alec Jeffreys and his team in 1985

© DAVID PARKER/SCIENCE PHOTO LIBRARY

HMS Alert and Discovery depart from Portsmouth

"Vintage engraving from 1878 showing HMS Alert and HMS Discovery departing from Portsmouth at the start of the British Arctic Expedition of 1875-1876, it was led by Sir George Strong Nares, and was sent by the British Admiralty to attempt to reach the North Pole via Smith Sound."

© duncan1890

184377242, 19th Century Style, British, European Culture, Old Port, Royal Navy

A couple walk along the Seven Sisters cliffs close to the Beachy Head lighthouse near Eastbourne

A couple walk along the Seven Sisters cliffs close to the Beachy Head lighthouse near Eastbourne, in southern England September 1, 2011. Trinity House, which is responsible for the lighthouse, has said that the it will not be repainted in it's distinctive red and white stripes because it is no longer required as a daymark. Local MP, Stephen Lloyd, has said he wants to start a fund-raising campaign to meet the approximate 45,000 pounds ($72,807) cost of repainting it to preserving its appearance. REUTERS/Luke MacGregor (BRITAIN - Tags: ENVIRONMENT SOCIETY TRAVEL) - LM1E7911CEG01