As winter approaches, finding the right room heater isn’t just about staying warm—it’s about ensuring your health isn’t compromised in the process. From convection to radiant heaters, each type offers ...

Pictured here is a map of the Partition of Africa. Photo courtesy of Stuart Rankin via Flickr Commons. The Scramble for Africa began with the Berlin Conference (1884–85) and ended by the early ...

Edited by Nicholas J. Turro, Columbia University, New York, NY, and approved December 8, 2011 (received for review December 7, 2011) (A) EWOD microchip with four concentric heaters (dashed circle) ...