Rafi Letzter

Back in 2016, researchers claimed Dragonfly 44 was a "failed" Milky Way — a galaxy with a huge dark matter mass but almost no stars. Now, on closer examination, that claim has fallen apart.

If the Higgs boson really is decaying into pairs of muons in the Large Hadron Collider, that's a big deal for particle physics.

Neutron stars are like the most efficient thermoses in the universe, filled with hot noodle soup. Here's how, over the course of millions of years, they cool down.

Pus caterpillars have among the most venomous stings of any animal in the United States. And they're having a boom year in Virginia.

A new test of Albert Einstein's theory of general relativity has proved the 20th Century physicist right again, this time using a supermassive black hole.

This supermassive black hole gobbled up a star in full view of Earth's telescopes, and could unlock secrets of how these monsters feed.

Delta will landfall just miles from the still-devastated Lousiana area where Laura hit in August, continuing a devastating hurricane season.

People in Louisiana are still living in tents after Hurricane Laura made landfall in August.

Something pulled the outer layer of Cassiopeia A off before it detonated to form this gorgeous supernova. But what?

Something is showering gold across the universe. But no one knows what it is, and key theoretical explanations are falling apart

The U.S. government is putting something big and secret in orbit tonight (Sept 30). Here's the little we can glean from public information.

What if scientists had started hunting for life on Venus in 1978?

The rubber ducky comet is glowing, but you can't see it. New analysis of data from the Rosetta probe shows an ultraviolet aurora all around the speeding object.

Earth has a small new moon coming, but it might have been made by people in the 1960s. It will take closer observations to know for sure.

Roads are flooded again. Protective dunes destroyed. Louisiana is bracing for another impact. And the season still has much more than a month left to go.

Thwaites Glacier holds enough ice to drive up sea levels more than 2 feet. These hidden ducts lubricate its collapse into the ocean.

Louisiana already has 23,000 climate refugees living in shelters following Hurricane Laura. Hurricane Sally will flood the region beginning today.

Phosphine, a chemical long thought to be a signature of life, is floating around in the clouds of Venus. How did it get there?

Three physicists won a $3 million Breakthrough prize for a series of experiments that began using cheap equipment on a tabletop in Seattle and ended up hunting dark matter.

Tracy Slatyer, known for hunting dark matter in our galaxy and discovering evidence of an ancient Milky Way explosion, has won a $100,000 prize funded by tech billionaires.

Two large black holes crashed together and formed a massive new one — the largest of its kind ever detected, so large that physicists weren't sure it could exist at all.

There's a strange sphere of mass at the outer reaches of solar space. Did another star help put it there?

A zoo in Poland plans to test cannabidiol — also known as CBD, a chemical found in cannabis — on its elephants. The elephants are stressed after a death in the herd.

The strongest Gulf hurricane since Katrina barrelled ashore in southwestern Louisiana early this morning (Aug. 27). Floodwaters may not recede for days.

Tropical storm Laura is now a hurricane, and it's expected to grow even stronger as it whirls toward Louisiana and Texas.