Mara Johnson-Groh is a contributing writer for Live Science. She writes about everything under the sun, and even things beyond it, for a variety of publications including Discover, Science News, Scientific American, Eos and more, and is also a science writer for NASA. Mara has a bachelor's degree in physics and Scandinavian studies from Gustavus Adolphus College in Minnesota and a master's degree in astronomy from the University of Victoria in Canada.
Scientists have recreated the first matter that appeared after the Big Bang in the Large Hadron Collider.
An ultra-high-resolution simulation of a tiny slice of the universe — a million times smaller than a proton — has revealed the very first structures to ever exist.
A new study suggests that annihilating dark matter particles may explain the Milky Way center's mysterious glow.
Astronomers have searched the entire Milky Way to identify the safest places to live. It turns out, we're in a pretty good spot.
Tiny snowflakes of radioactive uranium that trigger massive nuclear blasts might explain some of the universe's more mysterious star explosions.
A new study on the rotation of the universe's first light could suggest physicists need new rule-breaking subatomic particles
Astronomers have discovered four faint objects that at radio wavelengths are highly circular and brighter along their edges. And they're unlike any class of astronomical object ever seen before.
For the first time, a Polish group has identified two nearby stars that seem to have plucked up their icy partners, swinging them into orbits around our sun.
Black holes may not have singularities at their heart, but instead may be stuffed with dark energy.
Astronomers are learning that in some regions of our galaxy, stars have clumped into features that resemble ones on Earth — streams, waves, arches and mountain ridges.
Sending a carrier pigeon across the cosmos would probably be a more reliable way to send a message.
If you look around space, you'll notice a lot of things — the planets, stars, moons, even the galaxy itself — have one thing in common: they're spinning. So, is the universe spinning, too?
Measures of the universe's expansion taken from different sources don't match. An exotic form of dark energy particles could be the reason why.
Black holes are engines of destruction on a cosmic scale, but they may also be the bringers of life.
It may sound like the stuff of science fiction, but scientists have already detected a time warp.
The neutrinos enmeshed in the vast cosmic web could provide a glimpse of the earliest observable moment after the Big Bang.
A super-precise measurement of one of the fundamental constants of the universe suggests it's expanding faster now than it was in its early years.
The evidence for aliens around one of the weirdest stars in our galaxy — Boyajian's star — is not looking promising.
Past studies suggested there was less dark matter earlier on in the universe’s history.
A mysterious cosmic signal that was detected above the North Pole could be coming from fast-spinning grains of dust.