Vast numbers of digital photos are now being stored on people's computers - a new system aims to make annotation easy

A tiny fossil - the most primitive arm or leg bone yet recovered - reveals important insights into how animals colonised the land

The new 'Gmail' service will offer unprecedented storage and complex searching and sorting, all paid for by smart ads

The drug causes sperm to release the enzymes needed to enter an egg too early, as well speeding the sperm up

A new device can track an individual, shoot an aroma directly at their nose, and leave the person next to them completely unaffected

The finding could provide a way to screen for people at risk of sudden cardiac death, whose heartbeats can appear perfectly healthy

Newly revealed Stone Age jewellery may be the clearest evidence yet that early humans attached special significance to artefacts

Researchers also think the draft genetic code will speed the identification of key human genes and the creation of disease treatments

The winds on Titan whip up waves seven times higher than those on Earth, suggest computer simulations

Pure-bred dogs can be matched to their owners by strangers, but not mixed-breed mutts, find US psychologists

Online file-trading networks are not responsible for declining CD sales, claim the researchers behind a major new statistical study

New evidence reveals "a strong association" - the virus is thought to infected people via contaminated polio vaccines

The modified extract improves the verbal memory of older people within a few weeks, a new study finds

A tiny shot of alcohol could one day perk up worn-out micro-motors in a range of micro-electro-mechanical systems

Three teams of scientists have detected the gas in Martian skies - it could be produced by bacteria or volcanoes

Over 1000 laptop owners are to converge on a university gym in the hope of creating an instant supercomputer

Exposure to the nanoparticles caused significant brain damage, raising concerns over possible environmental harm from nanotechnology

The groundbreaking craft - propelled like a rocket - shattered all records in its super-fast test flight

The object actually orbits the Sun, but its corkscrew path means it appears to orbit Earth that from time to time

The chainsaw-wielding submarine means trees submerged after valleys were flooded by dams can now be put to good use

The red planet's unique polar spirals are reproduced by a new computer model inspired by slime mould

A pill could one day allow divers to stay under water longer without risking decompression sickness on surfacing, say researchers

The number of unwanted messages sent to the users of instant messaging programs is set to triple in 2004

A fuel that blends soya oil and traditional jet fuel could slash consumption of fossil fuel, reducing greenhouse gas emissions

The use of certain eye injuries to diagnose shaken baby syndrome is not supported by scientific evidence, say researchers

"Groundbreaking" new approaches to tackling one of the world's most devastating diseases are revealed

Giant dams on the headwaters of the mighty river are causing very low and strangely fluctuating flow, say downstream countries

The software giant claims stripping its media player from Windows will stop multimedia sites and software from working - others disagree

There is life on Mars, one NASA-funded microbiologist tells a conference - unfortunately it is just spaceship-borne contamination

Asian countries will be carrying out an uncontrolled experiment in viral evolution that could ultimately lead to a human pandemic