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A DAY AGO
Nation’s 250th Celebration Fireworks Sent D.C. Air Pollution Spiking
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.
- SCIENTIFIC AMERICANA DAY AGO

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
A DAY AGO
New Rules Require Election Changes for States to Get Terrorism Grants
Federal officials said they would withhold some money unless states pursue paper ballot systems, verify citizenship and conduct costly audits.
2 DAYS AGO
Heat Waves Are Taking a Big Toll on Chickens
The birds are particularly vulnerable to high temperatures, and France’s torrid June took a heavy toll.
2 DAYS AGO
Bill Frist Wants to Take Politics Out of Climate Change
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.
2 DAYS AGO
For Families With Nonspeaking Autistic Children, a Fierce Debate Over Assisted Spelling
Popular communication methods for nonspeaking autistic people have ignited a fierce debate over what counts as evidence of hidden cognitive abilities.
14 HOURS AGO
Chernobyl’s Wildlife Cameras Reveal How War Affects Wild Animals
A rare camera-trap study logged the effects of armed conflict on wild animals in real time.
- SCIENTIFIC AMERICAN13 HOURS AGO

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
- SCIENTIFIC AMERICAN8 HOURS AGO

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"
- SCIENTIFIC AMERICAN8 HOURS AGO

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
- SCIENTIFIC AMERICAN7 HOURS AGO

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
- SCIENTIFIC AMERICAN8 HOURS AGO

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
- SCIENTIFIC AMERICAN4 HOURS AGO

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
- SCIENTIFIC AMERICAN5 HOURS AGO

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
- SCIENTIFIC AMERICAN19 HOURS AGO

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