Marine mammals brought tuberculosis to the Americas before the Europeans arrived, a study suggests.

Palaeolithic humans in Spain began eating snails 10,000 years earlier than their Mediterranean neighbours, a study reveals.

Researchers suggest some standard methods to reduce the spread of MRSA infections need to be re-evaluated as they may do more harm than good.

Scientists determine the comet being followed by Europe's Rosetta spacecraft to have a mass of 10 billion tonnes.

A fence of palmyra trees is showing some success as a barrier to conflict between people and elephants in Sri Lanka.

One of the US aid workers who recovered from the Ebola virus says he is "thrilled to be alive" as he and another patient are discharged from hospital.

Nasa's Curiosity rover looks to examine another sample of Martian rock, but its drill test in a slab dubbed "Bonanza King" fails to complete properly.

Astronomers may have discovered the chemical signature of one of the Universe's earliest stars.