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Body & Brain
Pack-a-day smoking habits are on the wane, plus Haitian cholera and omega-3s in this week’s news.
By Science News -
ArchaeologyPueblo traded for chocolate big-time
New evidence of ancient Pueblo cacao drinking feeds a theory of long-distance trade.
By Bruce Bower -
HumansRecord ozone thinning looms in Arctic
Depletion could expose the northern midlatitudes to higher-than-normal ultraviolet radiation in coming weeks.
By Janet Raloff -
EarthCave formations record Black Sea deluges
Stalagmites in a Turkish grotto document 670,000 years of flooding.
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AstronomyNew study gives dark energy a boost
Measurements provide further evidence for a cosmic push that is accelerating the expansion of the universe.