Mean radius is the average measurement from the true center of the group (white) to the center of each shot. More simply, it's the average "miss distance." Group size, not mean radius, has been the ...

Trump signed an executive order banning federal funds for ‘gain of function’ research abroad The research alters viruses to increase transmissibility or severity in the name of preparedness Scientists ...

A percent chance of precipitation shows the probability there will be at least 0.01 inch of rain, snow or sleet at a given location. When you purchase through links on our site, we may earn an ...

Tiny glass beads brought back by NASA's Apollo 17 astronauts are helping scientists uncover new clues about how the moon erupted billions of years ago. No one expected these glittering bits among the ...

WASHINGTON (Reuters) - Final stem cell rules issued by the U.S. National Institutes of Health on Monday limit research to areas generally agreed upon by Congress in recent years, suggesting lawmakers ...