Mysterious bright radio flashes that appear for only a brief moment on the sky and do not repeat could be the final farewell of a massive star collapsing into a black hole.
Model of ape history during the past 15 million years has been fashioned through the study of genetic variation in a large panel of humans, chimpanzees, gorillas and orangutans.
Researchers have studied an early galaxy in unprecedented detail and determined a number of important properties such as size, mass, content of elements and have determined how quickly the galaxy forms new stars.
NASA’s Aqua satellite captured this image of the Yarnell Hill fire in Arizona on July 1, 2013. The fire was still burning on July 2, and 19 firefighters had been killed.
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