MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Zero-point energy. Illustration representing the concept of zero-point energy, related to that of vacuum energy and quantum fluctuations. According to quantum mechanics, a vacuum is not empty and energy and particles can be spontaneously created. Particle pairs form and exist briefly before usually annihilating one another in a burst of energy. The illustration depicts the creation of something from this 'nothing'.
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