Tunguska event. Image 2 of 3. Computer artwork of the initial break-up of the object that caused the Tunguska event in Siberia, Russia. A trail of smoke (lower left) formed as it moved through the Earth's atmosphere at tens of thousands of kilometres an hour. Lake Baikal is at lower left. North is at right. The Tunguska event was a massive explosion that took place at 0717 on 30 June 1908. A fireball was observed low in the sky, moving north-west. Expeditions to the area found immense damage, with over 3000 square kilometres of forest flattened. It is thought that the explosion was a meteorite or comet breaking up and exploding above the surface. For a sequence of the Tunguska event, see images R305/218-220.
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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