Scanning electron micrograph of 5-Fold symmetry in crysotile asbestos. Magnification on the 5'x4' transparency = X 600, 000. Credit to the Natural History Museum and Barbara Cressey of the University of Southampton. Date:
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10706325
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Snowflake, historical image
Snowflake. Light micrograph of a snowflake taken by Wilson Bentley (1865-1931). Bentley, a farmer from Vermont, USA, was the first person to successfully photograph snow flakes, taking the first photograph in 1885. He used a bellows camera attached to a light microscope. Snowflakes are symmetrical ice crystals that form in calm air with temperatures near the freezing point of water. The exact shape of a snowflake depends on local climatic conditions. Snowflakes typically have hexagonal symmetry. No two snowflakes are identical, as each experiences a wide range of conditions as it forms inside a cloud.
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Symmetrical production of matter and antimatter
False-colour bubble chamber photograph showing thesymmetrical production of matter & antimatter. Twoinvisible gamma-ray photons enter from the top &each produce a pair of electrons (green) &positrons - or anti-electrons (red). In the upperexample, the incoming photon also displaces anatomic electron, which shoots off towards bottomleft. In the lower example, all the photon'senergy goes into the production of the electron-positron pair; being more energetic, this paircurves less in the bubble chamber's magnetic fieldthan the upper pair, which form the characteristicspiral tracks of low-energy electrons & positrons.
© Lawrence Berkeley Laboratory/Science Photo Library