Two-row barley (Hordeum distichum). Watercolour artwork illustrating stages of growth of two-row barley. The stem at left is topped by spikelets of flowers, arranged on a raceme. The stem at right shows the development of grains, the weight of which has forced the spikelet to hang downwards. Two-row barley is the oldest cultivar of wild barley and is suitable for brewing due to its high enzyme content. However it does not have the high protein content of six-row barley. All barley is a good source of vitamin E, and the minerals calcium and iron.
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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