US President Donald Trump's decision to return Americans to the Moon is a step closer to reaching Mars, but only if Congress allocates money.
Three men and one woman were named by Nasa as the astronauts who will fly aboard spaceships built by private companies in the coming years.
European researchers have devised the first tiny motion detector that could help find microscopic life forms on distant planets.
Below average snow cover across the Arctic and excess summer ice melting in Greenland were observed this year by scientists.
More action is needed to rein in climate change in the coming years, a UN report said.
Nasa is readying its first test flight of the Orion spacecraft that could one day carry humans to Mars.
The explosion of a privately owned rocket has cast a spotlight on the risks involved with the reliance on the commercial industry.
Six people have sealed themselves inside a dome to embark on an eight-month test of how their mental health might fare during a mission to Mars.
Nasa awarded a total of $6. 8-billion to the two companies for their respective spacecraft.
Two big explosions on the surface of the sun will cause a moderate to strong geomagnetic storm on Earth in coming days.
Scientists tracking the spread of Ebola have released 99 sequenced genomes of the deadly and highly contagious hemorrhagic virus.
Researchers say Africa's elephant population is declining at a rate of about two percent annually.
The annual State of the Climate report 2013 is a review of scientific data and weather events over the past year, compiled by 425 scientists.
The latest news followed admissions of mishandled anthrax and forgotten smallpox vials at separate US government labs.
The vicious fight for survival may have led some people to evolve facial traits more quickly than others, a study said.
From Cape Canaveral to mission control in Houston, Nasa is building seawalls where possible and moving some buildings further inland.
A teenage girl who fell into a hole more than 12 000 years ago is offering new clues about the origins of the first Native Americans.
Scientists warn that the discovery holds major consequences for global sea level rise in the coming decades.
New techniques are helping shed light on the original beauty that faded with time on some of the world's greatest masterpieces.
On December 26, 2013, it was not there. On January 8, it was. But what is it?
Turbulent space weather forced Orbital Sciences to postpone the launch of a supply mission to the International Space Station.
Fermented carbohydrates in nuts caused cavities, tooth decay and bad breath in hunter-gatherers 15 000 years ago.
Two American astronauts prepared to step out on a rare Christmas Eve spacewalk to wrap up repairs to the cooling system at the ISS.
Nasa dreamed up the idea as a quick fix to a spacesuit problem so astronauts can step out to repair a valve at the ISS.
New findings at an old Neanderthal burial ground have bolstered the notion that cavemen cared for their elders.