It has long been assumed that our solar system, like a comet, has a tail. Just as any object moving through another medium – for example, a meteor traveling through Earth’s atmosphere – causes the particles to form a stream trailing off behind it.
Biologists and engineers at the University of California, Berkeley, are working on leaping robots based on dinosaurs and lizards.
Astronomers using NASA's Hubble Space Telescope have confirmed the existence of what they're calling a 'cometary planet' - one that's so close to its star that its heated atmosphere is escaping into space.
British scientists reckon they've identified the largest comet yet, using data from the ESA/NASA Ulysses spacecraft to measure the region of space disturbed by the its presence.