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As Ebola Spreads, Scientists Race to Find Vaccines and Treatments

CARL ZIMMER

The Bundibugyo virus, a little known type, previously had caused just two small outbreaks. Now it’s at the center of a rapidly widening epidemic in Africa.

Scientists just built a powerful AI computer worm that learns as it spreads

This prototype could help the world prepare for AI malware threats, according to the researchers who made it

NASA’s Mars mission MAVEN is lost forever

MAVEN was the first successful mission designed to study the atmosphere of Mars. It also became a vital node of NASA's communications network at the Red Planet

Landmark pancreatic cancer treatment paves way for targeting other tricky tumors

Unprecedented results against a stubbornly hard-to-treat cancer are boosting optimism that other challenging tumors will be next

E.U. Steps Up Ocean Monitoring as Trump Administration Backs Away

CHICO HARLAN

Days after the U.S. said it would kill a network of ocean monitors, European officials pledged to invest more in their version, calling it a “necessity.”

NASA Says Goodbye to its Longtime Mars MAVEN Mission

KATRINA MILLER

The space agency announced that the MAVEN spacecraft, which has circled Mars for more than a decade, is being decommissioned.

Arizona, Nevada Agree to Trade for Desalinated Pacific Ocean Water

SCOTT DANCE

A decade-old treatment plant in San Diego County, Calif., could leave more water in the Colorado River for states facing severe shortages.

As A.I. Makes Strides in Mathematics, Mathematicians Urge Caution

SIOBHAN ROBERTS

A week after OpenAI made headlines with an A.I.-generated proof, a new “declaration” by 16 experts raises concerns that the technology threatens math as a discipline.

White House reclassifies federal epidemiologists and other scientists from civil servants to “at-will” hires

The long-anticipated "Schedule F" order strips job protections meant to safeguard federal employees from political interference

Urban Light Pollution Might Be Worsening Allergies

MARTA ZARASKA

Light pollution prompts plants to shed pollen longer and stronger, according to new research.

Humans conquered the planet 300 times faster than genetic evolution can explain

Culture is humanity's secret for world domination. This calculation shows just how powerful it is

Search for alien technology on Interstellar Comet 3I/ATLAS comes up empty

Even though astronomers didn't detect alien tech signals from a rare interstellar visitor, the results are worthwhile, they say

Astronomers just solved a 50-year-old mystery about the Milky Way’s black hole

A breeze is emanating from Sagittarius A* at the heart of our galaxy

Did we just see a primordial black hole at the Milky Way’s edge?

A blip of light in the outer reaches of the Milky Way might be a bizarre black hole born at the beginning of time itself—and the long-sought solution to the mystery of dark matter. Astronomers are calling it "Phoebe"

Gwynne Shotwell, Elon Musk’s No. 2 at SpaceX, Is the Company’s Steady Hand

RYAN MAC

Gwynne Shotwell, the president and chief operating officer, is the adult-in-the-room foil to Mr. Musk as SpaceX prepares for a blockbuster initial public offering.