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New high‑resolution map transforms what we know about Roman roads and the Roman Empire

A massive digitization project has nearly doubled the known extent of the first continent-scale road network

She Was Finding Sources of Dangerous Water and Soil Pollution

SACHI KITAJIMA MULKEY

Melanie Malone led a research project to identify and study contamination sites in Washington State. Then the E.P.A. canceled her grant.

Math puzzle: Fix the matchstick equation

Fix the matchstick equation in this math puzzle

Neanderthal Dentistry, and the Scientist Glad Not to Have Experienced It

FRANZ LIDZ

The prehistoric hominins “apparently were very adept at what we would consider invasive medicine,” said the anthropologist John Olsen.

New NASA Hubble image captures a rare, turbulent galaxy

The new image shows the galaxy NGC 1266, a middle-aged object with a clutch of young stars that likely collided with another, smaller galaxy 500 million years ago

Scientists race to develop Ebola drugs as outbreak surges

Clinical trials for treatments against Ebola Bundibugyo virus are 'in a strong position' to be launched quickly in the Democratic Republic of the Congo and Uganda

Military Bases Are Rife With ‘Forever Chemicals.’ New Mexico Wants Them Cleaned Up.

ALEXANDER NAZARYAN AND NINA RIGGIO

The state is leading the country’s reckoning with PFAS. The outcome of its suit against the federal government will affect how courts treat more than 15,000 other claims nationwide.

A 16th-Century Sketch of Anne Boleyn More Likely Depicted Her Mother, an A.I. Analysis Finds

KATHERINE KORNEI

Using facial-recognition technology, scholars have concluded that a 500-year-old drawing labeled “Anna Bollein Queen” more likely showed her mother, Elizabeth Howard.

‘Sensational’ proof topples decades-old geometry problem

The sudden resolution of a well-known conjecture highlights the growing adoption of AI as an assistant in high-level mathematics

The Quest for Clean Hydrogen Moves Underground

BRAD PLUMER AND IAN WILLMS

The dream of clean hydrogen has tantalized energy experts for years, but producing it has been tough. Many start-ups think the answer could lie beneath our feet.

SpaceX punts Starship V3 launch to May 21 as investigation opens into Starbase worker’s death

SpaceX is now targeting the evening of May 21 to launch the latest and largest version of its Starship megarocket for the first time

What it’s like being stuck in a hantavirus quarantine for six weeks

Scientific American spoke to one of the people who are currently being monitored for possible hantavirus infection at the National Quarantine Unit in Nebraska

E.P.A. Clears a Weedkiller, Saying It Won’t Push Species to Extinction

HIROKO TABUCHI

The finding effectively paves the way for continued use of atrazine, a widely used herbicide that has been linked to birth defects and cancer in humans.

The U.S. just experienced its hottest 12 months on record

March was a scorching 9.35 degrees Fahrenheit hotter than the 20th-century average for the month, capping the hottest 12-month stretch for the U.S. since records began in 1895

Summerlike heat is breaking records in the East. Here’s why

A Bermuda High parked over the western Atlantic is pulling sweltering air up from the South, challenging records in parts of the eastern U.S.