Stone weapons carrying plant residues and possible poison compounds reveal how early humans used complex hunting strategies to survive beside an Arabian desert lake 125,000 years ago.
Two dramatic periods of mountain growth roughly aligned with biological diversification and major oxidation events, leading researchers to propose that erosion from taller ranges supplied oceans with nutrients essential for increasingly complex life.
An international expert commission has withdrawn the nation’s measles elimination status as sustained outbreaks, falling vaccination levels and more than 5,400 reported cases expose a severe reversal in decades of US public health progress.
A Stanford analysis found that metformin users with type 2 diabetes had a 39% lower risk of death after COVID-19, but researchers cautioned that patient differences and the study design prevent proof of a direct protective effect.
A study of 2,495 older adults in Ireland found no association between estimated lifetime exposure to fluoridated household water and cognitive performance, though researchers said continued monitoring and future studies remain important.
The American Cancer Society now recommends regular PSA testing from age 50 for average risk men and from 45 for Black men and those with strong family histories, citing stronger evidence that screening can reduce prostate cancer deaths.
Researchers examining Levantine archaeological sites suggest that colorful stones, crystals, fossils, and weathered tools became prehistoric keepsakes, possibly helping ancient hominins preserve memories, recognize meaningful landscapes, and eventually develop mechanisms supporting autobiographical memory.
NASA is inviting people worldwide to flash Voyager 1’s call sign toward the sky as the spacecraft becomes the first human made object to reach one light-day from Earth on November 18, 2026.