Geologists have long recognized that earthquakes are not randomly distributed on earth but occur in concentrated areas that coincide with and provide evidence for the theory of .

Which features do all new rocks formed near oceanic ridge share? pillow shaped stripes pattern provide evidence to seafloor spreading made from molten material iron oriented in same direction

Fertility and mortality rates are higher in more developed nations.

Uncle tom's cabin started out as a series of articles printed in the national era, a newspaper.