Here is what happened to Abdul Ahad Mohmand, Afghanistan's only cosmonaut, who was travelling back to earth with a Russian commander in 1988 with enough oxygen for just 24 hours.

The mystery behind a the strange 'alien megastructure' could soon be solved.

Climate change is speeding up the melting of the great sheet of ice covering Greenland, a frozen mass the size of Alaska that holds an estimated 10 percent of the world’s ice and scientists are sure of it, reports news and lifestyle magazine TakePart.

A massive space rock that will shave by Earth on Halloween looks like a dead comet with a skull face, NASA said after gaining a closer look at the spooky space object.

Scientists are baffled as they observe three species of wasps turning into three new species, as a result of evolutionary changes in one species of fruit fly.

The delicate remains of Homo floresiensis in a cave on Flores island in Indonesia told the remarkable story of a tiny species of early human, standing about 1 metre tall.

Stunned scientists announce the unexpected discovery of large quantities of oxygen on a comet which streaked past the Sun in August with a European spacecraft in tow.

The Cassini probe is all set to make a daring close flyby of Enceladus, an ice-rich moon of Saturn.

On Abaco Island, a graveyard of fossils at the bottom of a flooded sinkhole suggests that humans caused more animals to go extinct than natural changes in the climate

Venus, Jupiter and Mars to be seen together in the sky this week, in a rare grouping of the three planets.

Scientists discover one of the most complete skeletons of a turtle from the age of dinosaurs, and its nose looks an awful lot like that of a pig, reports CNN.

An image of Kerberos, one of the two tiny moons of Pluto, is finally been returned by the US space agency's New Horizons probe.

Alzheimer's disease can be detected decades before onset, using a virtual reality test, a study suggests.

The universe really is weird, which is bad news both for Albert Einstein and for would-be hackers hoping to break into quantum encryption systems. Eighty years after the physicist dismissed as "spooky" the idea that simply observing one particle could instantly change another far-away object, Dutch scientists said on Wednesday they had proved decisively that the effect was real.

One new study whose findings put the origin of life 300 million years ahead of schedule is stirring up controversy, according to The Washington Post.

Albert Einstein's general theory of relativity is about to celebrate its 100th anniversary, and his revolutionary hypothesis has withstood the test of time, despite numerous expert attempts to find flaws.

Scientists find fossil-like hints that some kind of life existed on Earth 4.1 billion years ago, when the planet was a mere volcanic toddler. That's 300 million years earlier for life to pop up than previously thought.

Today's dogs can trace their origins to Central Asia, according to one of the most comprehensive genetic surveys yet.

Waking up hundreds of miles above the Himalayas, astronaut Scott Kelly broke the US record for the most time spent in space with 383 days.

The sun has sprung a leak: A hole in the topmost layer of the sun and its magnetic field, the size of 50 Earths, is letting loose an ultrafast solar wind that has kicked off several nights of auroras down on Earth.