A Teenager Solved a Stubborn Prime Number ‘Look-Alike’ Riddle
In his senior year of high school, Daniel Larsen proved a key theorem about Carmichael numbers—strange entities that mimic the primes. ..
In his senior year of high school, Daniel Larsen proved a key theorem about Carmichael numbers—strange entities that mimic the primes. ..
Scientists want to pinpoint the technology that marked when humanity became a “geological superpower.” On the short list: the H-bomb and the modern ..
The state is ping-ponging between severe drought and catastrophic flooding. The solution to both? Making the landscape spongier. ..
Need to estimate, from trillions of miles away, how likely another world is to host life? There’s a flowchart for that. ..
Hidden screening devices are used to track the movement of dangerous materials—and recently caught a shipment of uranium at London’s Heathrow Airport. ..
Last year was one of the warmest measured, say NASA and NOAA. It would have been even more sweltering if not for La Niña, which will soon fade away. ..
XBB.1.5, aka the Kraken, is sweeping the Northeast US and dodging immunity. But that doesn’t mean it’s time to panic. ..
Data from Sweden and the US suggests cash incentives increase uptake without denting people’s trust in vaccines or future willingness to get them. ..
Lab animals have long borne the brunt of drug safety trials. A new law allows drugmakers to use miniature tissue models, or organs-on-chips, instead. ..
Flu meds and prescription drugs have been in short supply all winter—but the problem goes back over a decade. ..