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Fevered

What Really Killed the Aztecs? Try a 16th Century Megadrought

Linda Marsa | Posted 09.30.2013 | Science
Linda Marsa

The rat population was depleted during the drought, when food was scarce. But once the rains returned, food and water were suddenly plentiful and the number of infected rats exploded, spreading the deadly scourge to humans.

Hoodlum Weeds on a 'Fevered' Planet

Linda Marsa | Posted 09.28.2013 | Science
Linda Marsa

Hotter weather coupled with higher concentrations of carbon dioxide in the air prompt allergens like ragweed to grow larger and produce more pollen, and the carbon-enriched pollen is more noxious and damaging because it contains more of the chemicals that cause allergic reactions.