US scientists use an underwater robotic vehicle that can “plan its own experiments” on the seafloor.

US scientists show what they say is a direct link between the number of shops selling alcohol in an area and the violence occurring there.

A daytime nap improves the brain’s ability to absorb new information, claim US scientists.

Recent controversies surrounding climate research have eroded public trust in scientists, says a leading US scientist.

Progesterone – the sex hormone used in the first contraceptive pills – is to be tested on brain injury patients in a major US trial.

President Barack Obama unveils $8bn of loan guarantees to help build the first new nuclear power stations in the US for 30 years.

Researchers in the US say they have detected two signals which may indicate the presence of particles of dark matter.

The US space agency (Nasa) launches its Solar Dynamics Observatory from Florida on a mission to study the Sun.

The US space agency (Nasa) has launched its shuttle Endeavour on a mission to the International Space Station (ISS).

Two US pandas head for China, and a new diet and language.