TYPE ALL With engineering, a natural enzyme can better cut off some sugars that determine if a blood cell is type A, B or AB (as shown), resulting in a generic blood type that is safe for all people.
D.H. Kwan et al/Journal of the American Chemical Society 2015
AGAINST THE FLOW In a new experiment, micrometer-sized particles sensed their direction and propelled themselves upstream. Each particle (one shown in this micrograph) was made of a plastic sphere engulfing a hematite cube (colored red).
AS THE WORLD TURNS A 60-minute exposure of Mount Teide in the Canary Islands shows star trails, a product of Earth’s spin. Tiny deviations in Earth’s rotation rate could account for difficulties in measuring Newton’s gravitational constant, a new study suggests.
A surprising new result seems to suggest that subtle changes in Earth’s rotation rate could account for physicists’ difficulty in measuring Newton’s gravitational constant. But some confusion with dates appears to derail the finding.