There are many theories as to why the Neanderthals, our ancestral cousins, died out. A new theory suggests that modern humans may be the most successful invasive species of all time, with special thanks to our canine companions for giving us the competitive edge.
Climate scientist Gordon Hamilton died in Antarctica over the weekend when his snowmobile plunged into a deep glacial crevasse. His research in Antarctica and Greenland focused on the relationship between melting ice sheets and rising sea levels.
In the 1940s, the first African American women entered NACA's “computing pools." Some later became managers or engineers at NASA, and all made crucial — but often little-known — contributions to the math that put Americans in space.