String theory, conceptual image. Computer artwork representing the superstrings of string theory, a Theory of Everything (Grand Unification Theory) that seeks to unite gravitational force with the other fundamental forces (electromagnetism and nuclear forces) that are already described by quantum mechanics at the atomic level. The theory states that fundamental particles such as quarks and electrons are not points of energy or matter, but result instead from the vibrations of one-dimensional 'string-like' entities on a far smaller scale.
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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