Rafi Letzter

The U.S. can cut its carbon output to zero by the middle of the 21th century, according to a major new Princeton University study. It might even save money.

SpaceX plans to test its enormous Starship prototype over Boca Chica, Texas at some point Tuesday (Dec. 8).

Did the creator of the universe leave a hidden message in the cosmos for intelligent life? If so, scientists have yet to find it. But at least one is still trying.

"Jiuzhang" would be the most powerful quantum computer in the world, capable of performing some tasks 100 trillion times faster than the world's fastest supercomputers.

For more than a billion years, Earth covered itself in new continents. New research shows that those continents were quickly swallowed up again but their deaths fertilized life on the surface.

The Chinese submarine Fendouzhe has completed a months-long expedition to the deepest part of the ocean, a feat matched by only James Cameron, a hobbyist investor and the U.S. Navy.

What if dark matter weren't a new type of matter at all, but huge swarms of tiny, "primordial" black holes?

A device demonstrated in a groundbreaking new experiment acts like a laser, only backwards. And someday it might send power invisibly through the air.

Researchers examining Leonardo Da Vinci's drawings found a microbiome — a hidden biological signature of their travels across centuries.

A deadly virus that causes fevers, abdominal pain, vomiting, bleeding gums, skin rash and pain behind the eyes can now jump from one person to another.

Watch here as SpaceX launches its first fully crewed mission to the International Space Station (despite mounting pre-launch woes).

Two neutron stars slammed together far away from Earth, and the Hubble may have spotted a magnetar emerging from the aftermath.

Tropical storm Theta cements the 2020 Atlantic hurricane season's status as a record-breaker. And there's still time to run up the score.

We're likely just days away from the first fully-crewed SpaceX launch, after SpaceX fixed engine problems that cropped up in October.

President Donald Trump might win the election. But if he fails — if Biden is elected, and Trump makes good on his threat to not peacefully transfer power — what happens?

If anyone's trying to wake some dark spirits, tonight's the night. A "blue moon" and "beaver moon" will rise over All Hallow's Eve.

Arctic sea ice has been in decline for a while now, but 2020 is turning out to be the second-worst year ever — with implications for the whole planet.

Zeta was a weakened tropical storm just yesterday. Now it threatens a huge swath of the United States.

This supermassive black hole's spin has been measured for the first time, and it's surprisingly low.

Humans have gotten good at spotting planets orbiting alien stars. But how many of those alien stars are able to look back and see us?

Starman — the dummy riding a Tesla Roadster through space — has made his closest approach ever to Mars since his stunt launch in 2018.

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.