Katia Moskvitch

Scientists have been on the hunt for dark matter for decades. A new hypothesis now suggests that the strange invisible stuff could be made of microscopic, or quantum, black hole atoms.

The universe is expanding — and it is doing so at the same rate in all directions, according to new measurements that appear to confirm the standard model of cosmology.

The Milky Way is a spiral galaxy — but what exactly does it look like? Does it have two, four, or more arms? Astronomers think that now they’re one step closer to the answer.

Researchers studied the water content in the rocks from the lunar highlands. The analysis suggests that water in ancient lunar rocks and water on Earth may have a common origin.

Inside black holes dwell quantum remains of the stars from which they were formed, say a group of scientists, who also predict that these stars can later emerge once the black hole evaporates.

The Milky Way's spiral shape may look a bit like a snail — but galaxies like Earth's own haven't always had this structure. Now researchers say they know when and how these spirals emerged.

Alien microbes might have been crawling around on exoplanets just 15 million years after the Big Bang — and 10 billion years before life popped up on Earth.

Dark matter — the elusive stuff that is thought to make up most of the known universe — is almost certain to reveal itself during the next decade, says a researcher.

Scientists hope that in just a few months they may get a confirmation of whether accelerated expansion of the universe did indeed take place in the first fleeting moments after the Big Bang.

For decades, the space race was seen as being mostly about national pride. Getting there first mattered most, whereas pushing the frontiers of science and technology took a close second.

Piloting fighter jets, floating in zero gravity and spinning at a belly-flattening speed in a centrifuge are not the things a regular tourist is asked to do before a dream holiday.

Moon-forming giant impact caused a giant magma ocean on Earth; life appeared millions of years later, hitching a ride on a Martian rock, a scientist says.

The young moon may have been a magma "mush" for hundreds of millions of years before it solidified, a scientist says.

in order to truly answer the unsolved mysteries of the moon's origin, new missions to retrieve samples of the lunar surface and return them to Earth will be needed, one scientist said.

Just like the moon, Mercury is a desolate, rocky and airless body, albeit a bit bigger than Earth's satellite, said Sean Solomon, the principal investigator for NASA's Messenger mission to Mercury.

Is the moon a present from Venus, which once had a moon and then lost it? A wild new theory puts the scenario out there.

EchoBeach will study exoplanets from a hot air balloon, on the cheap.

Did life on Earth originate on Mars? Or did Earth dispatch life to Mars during an exchange of meteorites between both planets more than 3.5 billion years ago?