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In Spring 2000 world population estimates reached 6 billion; that is 6 thousand million. The distribution of the earth's population is shown in this map. http://sasi.group.shef.ac.uk/worldmapper/display.php?selected=2

The world as you've never seen it before

100 Very Cool Facts About The Human Body

The Brain The human brain is the most complex and least understood part of the human anatomy. http://www.globalone.tv/profiles/blogs/100-very-cool-facts-about-the
http://phrontistery.info/sciences.html

Definitions of Sciences and Studies

This list defines 633 sciences, arts and studies of various degrees of respectability and rarity, ranging from the common and esteemed (chemistry) to the obscure and quirky (peristerophily).
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bias science