After watching a black ghost knife fish and creating computer simulations of its movement researchers at Northwestern University have created a robotic fish. This is a very nimble robot that, after swimming backwards or forwards, can swim vertically almost instantaneously by using a special Ribbon like fin. In the future this will allow robots to [...]

A paper that is about to be published from the Tel Aviv University will show that the most massive black holes were  growing when the universe was about 1.2 billion years old and not as previously thought when the universe was 2 to 4 billion years old. They are also thought to grow at a [...]