twenty million years ago the Indian plate collided with Asia; this generated the Himalayan mountain range, which drastically altered the earth's climate forever after. Basically, "The climate became drier and the forests of what is now Africa and As Continue Reading...
" Hamilton explains that while Continental Lithosphere is as much as 93 miles thick, the "Oceanic Lithosphere" is much thinner - up to perhaps six miles. Indeed, the oceanic crust makes up only 0.099% of earth's mass, according to Hamilton. Oceanic Continue Reading...
Since taconite iron ore can be attracted by magnets, it is called a magnetite. Magnetite is abundant in the Minnesota Iron Range as well as the Michigan Iron Range that is located next to Marquette as well as in the Penokee Range in Wisconsin, Minne Continue Reading...
Alternative Energy Sources Concerns that have been raised regarding energy security have been occasioned by fears about oil and other fossil fuel depletion; reliance on foreign sources of energy; geopolitics; developing countries' energy needs; envi Continue Reading...
Figure 1. Demographic composition of the United States (2003 estimate). Source: Based on tabular data in World Factbook, 2007 (no separate listing is maintained for Hispanics). From a strictly percentage perspective, it would seem that Asian-Amer Continue Reading...
