Why physicists are determined to prove Galileo and Einstein wrong By Yasemin Saplakoglu Physicists dropped objects on a satellite for two years to test Galileo's theory of falling objects.
Mysterious particles spewing from Antarctica defy physics By Rafi Letzter What's making these things fly out of the frozen continent?
A giant star ate its dead neighbor and caused one of the brightest supernovas ever, new study suggests By Brandon Specktor In 2006 a star exploded 50 billion times brighter than our sun. New research suggests it wasn't one star, but two.
How big can a planet get? By Natalie Hinkel Why isn't there an endless variety of planets in the universe? An astrophysicist explains why planets only come in two flavors.
To find intelligent alien life, humans may need to start thinking like an extraterrestrial By Adam Mann Anthropologist reveals a potentially big flaw in the Search for Extraterrestrial Intelligence (SETI).
Self-destructing dark matter may be flooding the sky with gamma-rays, study suggests By Brandon Specktor There's a faint gamma-ray background in the universe, and scientists now think it could be caused by dark matter.
A burst of gravitational waves hit our planet. Astronomers have no clue where it's from. By Yasemin Saplakoglu The signal doesn’t seem to match the most obvious causes.
Identity-Switching Neutrinos Could Reveal Why We Exist At All. But Can We Find Them? By Tim Childers Scientists are searching for a ghostly neutrino particle that acts as its own antiparticle. If they find it, the discovery could resolve a cosmic conundrum: Why does matter exist at all?
UFOs May Be Piloted by Time-Traveling Humans, Book Argues By Leonard David The great distances covered by visiting "aliens" may be ones of time rather than space, a recent book argues.
Violent Solar Storms Are Happening Closer to Earth Than Anyone Thought Was Possible By Yasemin Saplakoglu The spectacular solar storms that paint the polar skies in beautiful greens and pinks have a darker side
The Black Hole at the Center of the Galaxy Is Forging a Strange New Kind of Star By Brandon Specktor The black hole at the center of the Milky Way may be warping and combining binary stars into a strange new kind of object, according to a new study.
Why Has String Theory Persisted? By Paul Sutter String theory is a powerful idea, unfinished and untested, but one that has persisted for decades despite inauspicious beginnings.
Billionaire Hosts Girlfriend Contest for 'First Woman to the Moon' and (Shocker) People Hate It By Chelsea Gohd Will the first woman to travel to the moon be the winner of a billionaire's "girlfriend contest"? We really hope not.
7 Billion-Year-Old Stardust Is Oldest Material Found on Earth By Mindy Weisberger Some of these ancient grains are billions of years older than our sun.
A Cosmic Gatekeeper Divides Our Solar System in Two By Yasemin Saplakoglu The inner and outer solar system look very different. This may be why.
This Newly Discovered Asteroid Is the Second-Closest Natural Object to the Sun By Laura Geggel Excluding Mercury, this newly discovered asteroid has the smallest known aphelion distance in our entire solar system.
Dark Energy Is Real, Despite Claim to the Contrary By Chelsea Gohd Researchers claim to have found serious fault with the existence of dark energy, but not everyone is buying into it.
Galaxy Group 13 Billion Light-Years Away Could Be Ending the Cosmic 'Dark Ages' Before Our Eyes By Brandon Specktor Three galaxies 13 billion light-years may be ending the cosmic 'dark ages' before our eyes.
No One Can Agree How Fast Universe Is Expanding. New Measure Makes Things Worse. By Adam Mann We just might need new physics to get out of this mess.
Our Galaxy Has Thousands of Alien Stars That Didn't Come from the Milky Way By Rafi Letzter Where did these stars come from?
