The Vela pulsar is a neutron star about 12 miles in diameter, itself spinning at a dizzying 11 times per second and the brightest and most persistent source of gamma rays in the sky. The pulsar and the supernova remnant was created by a star which exploded. Due to its behavior, it produces tremendously powerful electric and magnetic fields, which go on to accelerate particles in the remnant to nearly the speed of light. In effect, the pulsar is producing a vast, natural particle accelerator.
The Search for Extraterrestrial Intelligence (SETI) has been dominated for its first half century by a hunt for unusual radio signals transmitted by an advanced civilization. Writing exclusively in March’s Physics World, Davies, director of BEYOND: Center for Fundamental Concepts in Science at Arizona State University in the US, explains why the search for radio signals is limited and how we might progress.
In 1938 one of the world's greatet scientists withdrew all his money and disappeared during a boat trip from Palermo. Whether he killed himself; was murdered, lived on under a different identity is unknown. But no trace of The Italian physicist Ettore Majorana has ever been found. Majorana was a brilliant theorist who in the 1930's showed great insight into physics at a young age. He discovered an unknown solution to the equations from which quantum scientists deduce elementary particles: