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Nation’s 250th Celebration Fireworks Sent D.C. Air Pollution Spiking

QUINN GLABICKI

The president promised a record display of some 850,000 pyrotechnics for the country’s 250th birthday. The Park Service warned it could get dirty.

Why are the steel beams inside a Manhattan skyscraper buckling? Experts explain

Steel support columns in the Midtown building, which is being converted from offices into apartments, may have been overloaded, experts say

New Rules Require Election Changes for States to Get Terrorism Grants

SCOTT DANCE, NICK CORASANITI AND HILARY HOWARD

Federal officials said they would withhold some money unless states pursue paper ballot systems, verify citizenship and conduct costly audits.

Heat Waves Are Taking a Big Toll on Chickens

CHICO HARLAN AND LÉONTINE GALLOIS

The birds are particularly vulnerable to high temperatures, and France’s torrid June took a heavy toll.

Bill Frist Wants to Take Politics Out of Climate Change

CARA BUCKLEY

Bill Frist, a surgeon who also served as Senate majority leader, has emerged as an outspoken advocate for environmental health. “A healthier planet means healthier people,” he said.

For Families With Nonspeaking Autistic Children, a Fierce Debate Over Assisted Spelling

AZEEN GHORAYSHI

Popular communication methods for nonspeaking autistic people have ignited a fierce debate over what counts as evidence of hidden cognitive abilities.

Chernobyl’s Wildlife Cameras Reveal How War Affects Wild Animals

EMILY ANTHES

A rare camera-trap study logged the effects of armed conflict on wild animals in real time.

Why more extreme rain could mean more shark bites

As rainfall intensifies with climate change, waste flushed out to sea could attract more sharks, putting beachgoers at risk

Einstein’s greatest theory triumphs again in landmark frame-dragging measurement

A best-yet measurement of one of general relativity's most mind-boggling effects is "another feather in Einstein's cap"

Detecting hidden nuclear weapons in space may be possible using cosmic rays

For almost 60 years, a global ban on nuclear weapons in space has held up. But the growing number of satellites and increasing geopolitical tension has scientists worried the moratorium could fail

RFK, Jr. is turning his attention to the U.S. Preventive Services Taskforce

The U.S. Preventive Services Task Force is an independent group that offers guidance on what health screenings and medications health insurance should cover

Why ‘Neil the seal’ is unleashing chaos in Tasmania

This one-ton elephant seal has gone viral for smashing into cars and infrastructure, but biologists have a more poignant explanation for his behavior

Scientists get clearest view yet of a spreading seafloor

A rare eruption in the Indian Ocean let researchers capture one of the clearest views yet of a seafloor spreading event

Can we geoengineer ourselves out of an El Niño year?

A controversial geoengineering proposal suggests that brightening clouds off South America could weaken a burgeoning El Niño, but major technical and ethical questions remain

International timekeepers to vote on changing the leap second to a leap hour

To align Coordinated Universal Time with Earth's rotation, a second occasionally gets added to the year. That may change in 2027