Microsoft will today unveil its next generation of hand-held organisers aimed at taking market share from Palm. Pocket PC is the latest version of Microsoft's Windows CE hand-held operating system, and at its launch will boast device support from Hewlett-Packard, Compaq and Casio.
Some analysts predict that Pocket PC will reduce Palm's 80 per cent share of the hand-held market.
Some parts of Atacama have not received rainfall for 500 years - but a sudden deluge of water upset the Desert's delicate biological balance
Spitzer Space Telescope could not spot Oumuamua, suggesting that it is actually pretty small
Greenland crater one of the 25 largest impact craters on Earth
This long-sought progenitor star was identified in an image captured by Hubble in 2007