Global warming notes:
Guy Stewart Callendar first said that fossi...
Mount Saint Helens:
30 years before: 1980
For 120 years the volca...
2 people born per second, 80 million per year.
1492 Columbus took possession of Hispaniola (the Spanish Island) du...
Sedimentary - sandstone limestone, built by deposition of sediment,...
l e a r n • r e f e r e n c e • r e v i e w
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