大象传媒

A massive burst of radiation in space has revealed the existence of star SGR 1900+14, a type of neutron star called a magnetar. Scientists and archaeologists who assist in solving crime by examining pollen grains, including the identity of the bodies in a mass grave in Magdeburg, Germany. How a biological "antifreeze" found in carrots may give transplant organs longer shelf lives. The part grandmothers have played in human evolution.