PHOTO GALLERY
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SOLAR SYSTEM
Jupiter had brief encounter For 12 years in the middle of the last century, the giant planet drew a passing comet into orbit before flinging it away again
GREEN TECH
Electricity grows on trees Simply plugging into tree trunks allows tiny trickles of power to be leached. Start-up companies and academics are working out what can be done with it
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MEDICINE
Surgery鈥檚 sci-fi future See worm-like capsules designed to crawl through your gut, robots that assemble themselves inside your body and other gadgets that are pushing at the boundaries of medicine
COMPUTING
Code-breaking legend See a working reconstruction of Colossus 鈥� the computer that broke Germany鈥檚 codes in the second world war
TECHNOLOGY
The future of our data stores As music, movies and photos continue to swell our personal data stores, technologies that can cram the information of more than 20 DVDs into a square inch are becoming increasingly practical
BLOG
US firm withdraws from dogfight with Korean cloners As it drops out of pet cloning, a Californian company reveals problems that may alarm animal welfare activists
SPACE
Images of Earth from space for $150 See the results of an experiment to take space pictures on the cheap using a balloon, a digital camera and a cellphone