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At Least 1 in 4 NFL Players Gets CTE, Major New Study Finds

JOHN BRANCH

The actual prevalence, researchers said, may be much higher.

3 Charts That Explain El Niño

MIRA ROJANASAKUL AND CHICO HARLAN

With air and sea surface temperatures already breaking records, this year’s episode is on track to be the strongest in living memory.

E.P.A. Moves to Curb Public Input on Air Pollution Permits for Data Centers

MAXINE JOSELOW

Under the proposal, states would no longer need to provide public notice or solicit comments on air pollution permits for data centers and other projects.

Silence, Wolves and the Wild East: Hiking in Portugal’s Côa Valley

BEN BUCKLAND

A trek in a remote corner of the Iberian Peninsula brought a writer face-to-face with ancient oaks, rewilding efforts and prehistoric cave art.

Wildfires Are Turning Forests in the American West Into Shrubland

ERIC NIILER AND NIC COURY

Towering woodlands in the West are being permanently replaced by tracts of spiky shrubs. Conditions “just aren’t normal anymore,” one researcher said.

Elon Musk's SpaceX to expand beyond Texas Starbase with new Louisiana spaceport dedicated to Starship

The new spaceport is aimed to support thousands of launches each year, according to SpaceX.

The U.S. just recorded its first two deaths from measles for 2026

Both of the deceased were unvaccinated against measles. The deaths are the first fatalities caused by the preventable disease in the state of Pennsylvania in 35 years

MAHA Moms Take On Coal

DAVID GELLES

Some leaders of the health movement are challenging a pillar of the president’s energy agenda.

A Chinese A.I. Lab May Test the World’s Cybersecurity With a Model

CADE METZ

In July, an unreleased OpenAI model went rogue and demonstrated remarkable hacking abilities. This week, a lab called Z.ai will release a similarly powerful system to everyone.

SpaceX to Spend $100 Billion on Spaceport in Louisiana

RYAN MAC

It would be the rocket company’s second private launch site after Starbase, its headquarters in South Texas.

The overlooked role of sperm DNA damage in recurrent miscarriage

New recommendations spotlight sperm's role in recurrent miscarriage

NASA’s Roman Space Telescope could reveal dark energy’s deepest secrets

The more scientists try to understand dark energy, the more its mysteries seem to grow. NASA's newest space telescope is custom-built to crack the case

Meta to pay $18 billion and make sweeping app changes to settle social media harms lawsuit

Meta agreed to implement new safety measures, including a default two-hour daily limit for using Facebook and Instagram, for users under the age of 18

Controversial Alzheimer’s surgery is said to reverse symptoms. Here’s what scientists say

Jaw-dropping patient videos and miraculous testimonials ignited a frenzy in China over a technique that aims to improve drainage from the brain in dementia patients. Now it is entering trials worldwide

Americans Encounter Risks at Psychedelic Clinics Abroad

NOAH DALY AND ANDREW JACOBS

Participants, often in vulnerable states, have little recourse if mistreated or injured.