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A first-of-its-kind trial is testing adult stem cell transplants for advanced dry macular degeneration. Early results show the treatment is safe and can significantly improve vision, even in severely affected patients. Participants gained measurable ...

Migratory birds that fill North American forests with spring songs depend on Central America's Five Great Forests far more than most people realize. New research shows these tropical strongholds shelter enormous shares of species like Wood Thrushes, ...

Around 115 million years ago, northern Australia's seas hosted a colossal shark that rewrites what we thought we knew about early ocean predators. New fossil discoveries show that modern-type sharks were experimenting with gigantic sizes far earlier ...

Water trapped inside tiny molecular cavities behaves in a surprisingly energetic way, pushing outward like people crammed in an elevator. When a new molecule enters these narrow spaces, the confined water forces its way out--boosting the strength of ...

Scientists discovered that deep earthquake faults can heal far faster than expected, sometimes within hours. Slow slip events in Cascadia reveal repeated fault movements that only make sense if the fault quickly regains strength. Lab experiments show ...

Scientists have uncovered a long-missing piece of the volcanic puzzle: rising magma doesn't just form explosive gas bubbles when pressure drops--it can do so simply by being sheared and "kneaded" inside a volcano's conduit. These shear forces can ...

People who smoke only a couple of cigarettes a day still face surprisingly high risks of heart problems and early death. A large review of long-term studies shows that even very light smokers can see their risk of heart failure climb sharply. While . ...

Researchers uncovered how estrogen subtly reshapes learning by strengthening dopamine reward signals in the brain. Rats learned faster when estrogen levels were high and struggled when the hormone's activity was blocked. The findings help explain how ...

A massive real-world study comparing tirzepatide and semaglutide reveals both drugs deliver strong, early cardiovascular protection--reducing heart attack, stroke, and death in adults with type 2 diabetes. While companies have claimed large ...

Researchers discovered that the common amino acid arginine can block harmful A aggregation and reduce its toxic effects in Alzheimer's disease models. In flies and mice, oral arginine lowered plaque levels, reduced inflammation, and improved behavior ...