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In the late 1970s, a team of karate-loving physicists decided to perform an experiment inspired by their collective passion for martial arts. The group was made up of physicist Michael Feld, a brown belt who liked to illustrate the physics of karate via live demonstrations to his classes at the Massachusetts Institute of Technology; Ronald McNair, future astronaut and fifth-degree black belt; and undergraduate Stephen Wilk. “The picture of a karate expert breaking stout slabs of wood and concrete with his bare hand is a familiar one,” begins a 1979 paper by Feld, McNair, and Wilk. The trio wanted to know: How can a bare hand demolish a solid...... Read Full article on HadNews

3 Mysteries of the Universe — and a New Force That Might Explain Them | Alex Keshavarzi | TED In the world of particle physics, there are still many mysteries about the universe that scientists are trying to unravel. Three major mysteries include dark energy, dark matter, and the matter-antimatter asymmetry. Dark energy, which makes up 74 percent of the energy content of the universe, is responsible for the accelerating expansion of the universe. Dark matter, comprising 21 percent of the energy content, is necessary to explain the gravitational effects on galaxies. The matter-antimatter asymmetry, where antimatter seems to have disappeared, ...... Read Full article on HadNews