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Why the Grand Canyon flash flood was so devastating
Experts explain why a monsoon storm turned so deadly
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Latest science news, discoveries and scientific developments.
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Where is the Roman Telescope in space?
The Nancy Grace Roman Telescope is headed toward a Lagrange point, a critical position in outer space where gravitational forces behave in specific ways
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ZWO Seestar S50 Pro smart telescope review
ZWO's best pro smart telescope to date is perfect for astronomy and solar imaging, with a price to match.
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Growth hormone peptides promise to stall aging—but does the science stack up?
Sermorelin, tesamorelin and other growth hormone peptides are being touted as antiaging elixirs, but what evidence is behind those claims?
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A massive plume deep beneath Africa is pulling the continent apart
A vast plume rising from deep inside Earth may be responsible for mysterious movements along the East African Rift. The discovery reveals how forces deep in the mantle are working alongside shallower geological forces as the continent slowly pulls apart.
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Ghostly green lakes merge in Australian outback after 2 years of heavy rain — Earth from space
A 2024 satellite photo shows a series of ephemeral lakes that merged into a single emerald structure in Australia's Northern Territory following two years of extreme rainfall.
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The brain, solved
The human brain has upward of 86 billion neurons, connected by some 100 trillion synapses
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Bonus crossword: Tints of life
Play a bonus science crossword that ties into even more stories from the September 2026 issue of Scientific American.
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One of Earth’s driest places was just covered in snow
Rare storms covered huge stretches of Chile’s Atacama Desert in snow and dumped extraordinary amounts of rain on one of the driest regions on Earth. The extreme weather shut down observatories, triggered damaging floods and mudflows, and unfolded against the backdrop of a strengthening El Niño.
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'It's in the realm of possibility': Climate change is spurring a reemergence of yellow fever, and the US could face future threats
The yellow fever virus is reemerging in regions where it hadn't been seen for decades. Warmer temperatures and extreme weather could make conditions more favorable for the mosquitoes that carry the virus.
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Nepal’s deadly debris avalanche is a warning for the rest of the world
Avalanches like the one that devastated parts of Nepal and Tibet are becoming more common thanks to climate change. Here’s where else is at risk
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NASA’s Swift telescope is back, but time is running out
NASA has brought two of Swift’s telescopes back online after technical problems derailed a commercial mission intended to rescue the aging observatory by raising its orbit. With atmospheric drag pulling the spacecraft downward faster than expected, scientists may have only another month or two before Swift falls below a critical operating altitude.
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NASA delays Crew-13 launch after leak found on SpaceX Dragon
NASA and SpaceX have delayed Crew-13 after finding an oxidizer leak in the Dragon spacecraft’s propulsion system during prelaunch preparations. Engineers are investigating the problem before the four-person crew can begin its journey to the International Space Station.
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Goodbye CPAP? New sleep apnea pill cuts breathing events by 44%
A once-nightly pill cut breathing interruptions by about 44% in a major phase 3 sleep apnea trial, while improving oxygen levels and disease severity. By strengthening the muscles that keep the airway open during sleep, AD109 could offer a new option for people unable to tolerate CPAP.
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Mathematician discovers how to fold the smallest origami doughnut
How many times do you have to fold a piece of paper to make a doughnut? After decades, a mathematician has determined the most efficient technique
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Scientists find a human-only gene that may help explain our brainpower
Scientists discovered that human microglia, immune cells that help shape developing brain circuits, can take four to eight years to mature instead of just weeks as they do in mice. The unusually slow process may help explain how the human brain develops its remarkable complexity and cognitive abilities.
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Migraine drugs are getting more precise. Choosing the right one is still tricky
Migraine prevention drugs are more targeted than ever before, and new guidelines may help doctors predict which will work for each patient.
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'This is probably the safest time to be playing the sport of football': Concussion expert explains why viral CTE study may not be as scary as it sounds
A new study suggests that at least 1 in 4 former NFL players who died in recent years had CTE. Concussion expert Thayne Munce puts the finding into context.
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What’s next for NASA’s new Roman Space Telescope?
After a flawless launch, the Nancy Grace Roman Space Telescope is on a mission to solve some of the universe’s biggest mysteries
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The backlash against screens in schools is escalating
School districts are banning AI, states are limiting educational technology in classrooms, and Meta will set new “school mode” restrictions—here’s what to know