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- SCIENTIFIC AMERICAN2 DAYS 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
A DAY AGO
Spread of Seafloor Directly Observed for the First Time
The spread of the ocean floor, as tectonic plates spread apart, is known but hard to observe. Scientists have now documented the process in action.
17 HOURS AGO
Western Europe Had Its Hottest June on Record
An unusually early heat wave smashed records across France, Britain and Spain. Temperatures in some areas are starting to soar again.
A DAY AGO
Mysterious Spheres Found in Australia Are Likely Space Debris
The discovery bemused residents of a small town in northeastern Australia. The objects appear to be junk from a space launch, the country’s space agency said.
- SCIENTIFIC AMERICAN9 HOURS AGO

Early bird, night owl or something else? Five patterns may define how we sleep
New research identifies five distinct sleep subtypes, revealing links between brain patterns, behavior and health
3 HOURS AGO
These Fossils May Be the Earliest Evidence of Handedness in Animals
Scientists propose that recently uncovered fossils may be the earliest evidence of behavioral “handedness” in animals.
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.
4 HOURS AGO
A Chinese Spacecraft Captures First Image of Quasi-Moon
A Chinese spacecraft has captured the first image of the asteroid Kamo‘oalewa.
10 HOURS AGO
How to Turn Your Phone Into a Personal Health Dashboard
Free apps from Google, Samsung and Apple can help you track your diet, exercise and well-being — and provide vital information during emergencies.
5 HOURS AGO
I.U.C.N. Update Says Deep-Sea Mining Threatens Mollusks Around Hydrothermal Vents
The snails and other mollusks around hydrothermal vents have evolved to thrive in extreme conditions, but mineral extraction could drive more than half to extinction.
10 HOURS AGO
This Kind of Obsessive Attraction Isn’t Love. But It Has a Name.
Limerence is more than a crush, psychologists say, and it can persist for months or years.
- SCIENTIFIC AMERICAN3 HOURS AGO

Cases of explosive diarrhea-causing cyclosporiasis are rising fast in the U.S.
Cyclosporiasis case numbers have skyrocketed from several dozen nationwide in June to more than 1,000 in the state of Michigan alone today
2 HOURS AGO
Wally Funk, Who Set an Age Record for Space Travel, Dies at 87
As a young woman in the 1960s, she wasn’t allowed to become a NASA astronaut. She finally realized her long-held dream of flying in space as an octogenarian.
- SCIENTIFIC AMERICANAN HOUR AGO

Physicist says splashy new cosmology study made ‘elemental’ mistake
A recent study in the journal Nature carries cosmos-quaking implications for our understanding of the universe—except a new preprint says that it's wrong
- SCIENTIFIC AMERICANAN HOUR AGO

These absurdly cute mice live at higher altitudes than any other mammal—here’s how they do it
Living at altitudes with less than half the oxygen at sea level, these mice have adapted to their environment in unique ways