Earth's water is more likely to have come from asteroids that hit our planet billions of years ago than comets, say researchers.
Markings dating back 40 000 years suggest Neanderthals were considerably more sophisticated than previously thought.
Astrophysicists cast doubt on what recently was deemed a breakthrough in confirming how the universe was born.
The most comprehensive study of Mexican genetics to date has revealed a vastly diverse and nuanced genetic landscape.
Nasa has been warned that its mission to send humans to Mars will fail unless it revamps its methods.
A warmer Arctic could permanently affect the pattern of the high-altitude polar jet stream, resulting in longer and colder winters.
The International Space Station is crucial to advances in science, health and technology, experts say.
The surface of the sun has been surprisingly calm of late prompting curious scientists to wonder just what it might mean here on Earth.
A three-day meeting has brought together Nasa experts for talks focused on exploring the neighbouring planet.
Nasa and private sector experts now agree that a man or woman could be sent on a mission to Mars over the next 20 years.
Sixty years after the first successful polio vaccine trial, the disease has been wiped out, but violence and lack of cash keep it from disappearing.
Health experts are urging the United States and other countries to boost their ability to identify fake or subpar medicines.
Researchers have disproved a long-held theory about how some bacteria survive antibiotics.
SpaceX has readied a fresh bid to become the first private firm to launch a craft to the space station.
Engineers have aborted the launch of a privately built spacecraft on a landmark mission to the International Space Station at the last second.
Elon Musk, the Internet entrepreneur and owner of SpaceX, admits he has a case of pre-launch jitters.
SpaceX’s demonstration flight to the ISS in April is a key test for the private sector, following Nasa’s decision to axe its space shuttle program.
The US has unveiled a hard hitting anti-tobacco campaign using graphic images of the physical damage caused by cigarettes.
Drugs fed to animals to promote growth and prevent diseases may play a key role in the emergence of antibiotic resistant bacteria, say microbiologists.
Nasa has unveiled its plans for a massive new launcher capable of powering manned space flights well beyond low-Earth.
Astronauts and space agency chiefs circled the orbiter as it rested on the runway, gazing at the vessel as it bathed in the morning sunlight at Kennedy Space Centre ...
The launch of the US space shuttle Endeavour was delayed at least 48 hours due to a technical failure, Nasa said.
The study has puzzling scientists who argue it is not a sign we are growing dumber.