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MathMayan Mars
The curiously looping movements of the planets relative to the stars have presented all sorts of puzzles to keen, patient observers of the night sky. In 1601, Johannes Kepler (1571-1630) undertook the challenge of deciphering the orbit of Mars and developing a mathematical theory of its motion to fit observations of the planet’s changing position […]
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PhysicsWhen warming up causes cooling down
Under the right circumstances, heating a tiny cluster of sodium atoms makes its temperature fall.
By Peter Weiss -
PhysicsPhysicists get B in antimatter studies
New observations that subatomic particles called B mesons decay differently from their antimatter versions may help explain why the universe is made almost entirely of matter, not antimatter.