32:01
Space invaders: strategies for life in a crowd
In this program, the need for personal space is explored through the avoidance behaviors people employ to maintain a perceived distance from others, such as falling into a "middle-distance stare" in a crowded subway; the use of a proxy, like a jacke...
55:22
Alkaline earth metals
Almost as unstable as alkali metals, soft and silvery alkaline earth metals react easily with water. Segments in this program include Exploring Alkaline Earth Metals (properties of the alkaline earth metals); Calcium: Building Bones (the relationshi...