Images Dated 12th August 2005

Normal axial view of C5 showing disk, nerve roots, posterior

Horizontal, Detail, Anatomy, Diagram, Illustration, Spine, Medical, Biology, Disk, Anterior, Posterior, Cut Out, White Background, Artwork, Color Image, Front View, Close Up, Healthcare And Medicine, The Human Body, No People, Part Of, Human Body Part, Spinal cord, ligament, Axial view, longitudinal ligament, nerve roots, biomedical illustration, human internal organ, anterior longitudinal ligaments, posterior longitudinal ligaments, Illustrations & Artwork, 667599453

A marker in Seward Alaska indicates the starting point of the original Iditarod Trail

A marker in Seward Alaska indicates the starting point of the original Iditarod Trail sled dog race (Editorial Usage Only)

© Luc Novovitch / DanitaDelimont.com

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Aurora borealis display reflected upon water

An aurora borealis display (northern lights) reflected on the surface of water. Aurorae are caused by the interaction between energetic charged particles coming from the Sun and molecules of gases in the upper atmosphere (about 100km). A stream of charged particles, known as the solar wind, flows continuously from the Sun's corona towards interplanetary space at speeds of 400-500 km/s. These particles do not reach the Earth's atmosphere due to the shielding effect of the Earth's magnetic field. However, violent solar activities such as solar flares emit highly energetic particles which penetrate this shield and ionise molecules in the atmosphere

© PEKKA PARVIAINEN/SCIENCE PHOTO LIBRARY