Removing a stroke-causing clot still helped patients up to 24 hours after symptoms began, when good brain scans picked the right people. Across 505 patients from 6 trials, longer time before treatment did not lower the benefit.
One of the four seasonal flu types, called influenza B/Yamagata, has not been seen anywhere since 2020. A computer model suggests it disappeared simply because it spread less easily, leaving it fragile when the pandemic slashed close contact between people.
In teens with a thickened heart muscle, a daily pill called mavacamten sharply reduced a blockage in blood flow leaving the heart. After 28 weeks, the blockage pressure dropped by about 48 units in the pill group versus almost nothing on a dummy pill.
Researchers measured proteins and other molecules in people's blood after three kinds of stress. Mental stress changed the blood very little, while physical stress and especially bungee jumping caused large, lasting changes.
Scientists built a tiny DNA device that reaches across a cell's outer skin. When it touches a matching RNA molecule inside, it lights up on the outside while the cell stays alive.
Two kinds of fruit bat pointed their echolocation calls toward a coming turn before they actually turned. The direction of their sound predicted the next change in flight path about 70 to 77 percent of the time.