The largest bear that ever lived also had the strongest bite of any land mammal, say scientists.

Six men locked away in steel tubes for a year-and-a-half to simulate a mission to Mars are set to end their experiment.

Earthquakes have a bigger impact on health than other natural disasters such as floods and hurricanes, US researchers say.

Scientists show that women who were first to settle in Canada had more children, and grandchildren than those that followed.

Astronomers spot the highest-energy light known - gamma rays - coming from what seems to be the youngest millisecond pulsar yet found.

The Brazilian government is likely to move the dates of a key UN environment summit, as a clash with the UK Royal Jubilee threatens to keep leaders away.

Network Rail is to use a Nasa-grade material to help prevent railway track equipment from freezing this winter.