Physicists have directly observed a long-predicted quantum effect of gravity, putting one of Einstein’s foundational ideas to a striking new test. Using ultracold atoms, researchers split an atom’s quantum wave so that one part was held in place while the other fell freely under gravity, then reunited the two to measur
The extinct “American cheetah” was not really a cheetah at all, but a puma relative with an unexpectedly flexible lifestyle. Fossils from the Yukon suggest northern populations survived partly by eating fish, possibly including salmon, while southern cats hunted on land.
A critically endangered roloway monkey has given birth just months after surgeons performed an unusual operation that saved her foot from amputation. Her new daughter, Lagertha, is an important addition to a species believed to number fewer than 2,000 in the wild.
A critically endangered roloway monkey has given birth just months after surgeons performed an unusual operation that saved her foot from amputation. Her new daughter, Lagertha, is an important addition to a species believed to number fewer than 2,000 in the wild.
A surprising immune system signal may help explain why zebrafish can regenerate damaged spinal cords so effectively. Researchers found that certain neutrophils release Il-4, which calms harmful inflammation and allows injured nerve fibers to grow again. Without these cells, healing stalled, but adding Il-4 restored reg
A chemical commonly used in dry cleaning and found in some household products may be an overlooked threat to liver health. Researchers found that people with detectable levels of tetrachloroethylene (PCE) in their blood were three times more likely to have significant liver fibrosis, a dangerous buildup of scar tissue
Could math help explain why some relationships survive life’s inevitable stresses while others slowly fall apart? Researchers have spent decades developing mathematical models that treat romantic feelings as changing systems, revealing patterns in attraction, emotional reactions, conflict, and recovery.
Could math help explain why some relationships survive life’s inevitable stresses while others slowly fall apart? Researchers have spent decades developing mathematical models that treat romantic feelings as changing systems, revealing patterns in attraction, emotional reactions, conflict, and recovery.
A rediscovered memoir reveals that celebrated War of 1812 veteran Shadrack Byfield was far more rebellious and troubled than history has portrayed, battling chronic pain, poverty, authorities, and even rivals at his local chapel. The soldier who buried his own amputated arm and invented a custom prosthesis spent decade
A large study of nearly 74,000 men suggests that long-term use of tadalafil, best known as Cialis, may be linked to a higher risk of glaucoma and other eye pressure problems. Men prescribed the drug for urinary symptoms caused by an enlarged prostate were 22% more likely to develop glaucoma, 32% more likely to develop
A large study of nearly 74,000 men suggests that long-term use of tadalafil, best known as Cialis, may be linked to a higher risk of glaucoma and other eye pressure problems. Men prescribed the drug for urinary symptoms caused by an enlarged prostate were 22% more likely to develop glaucoma, 32% more likely to develop
Scientists have found evidence that some gut bacterial populations can spread rapidly between people and across continents, suggesting the microbiome may be more transmissible than previously thought. The research also revealed hidden bacterial groups associated with aging, colorectal cancer, inflammatory bowel disease