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Why would aliens come all this way just to invade Earth?

In movies, when aliens invade our planet, they usually have a ludicrous motivation. Like, they're after our water. Or our gold. (Hint: Asteroids have gold.) Space travel is incredibly difficult and expensive — so why would aliens actually bother to come and invade us? We asked some experts for reasons that actually… »5/02/13 1:30pm5/02/13 1:30pm

How to distinguish crap denialism from legitimate scientific debate

In the latest issue of Environmental Health Perspectives, science writer Wendee Holtcamp highlights the manifold differences between unreasoned denial of scientific evidence and legitimate, rational controversy and debate. Being able to distinguish between the two, she notes throughout her essay, is crucial if one is… »8/14/12 8:15am8/14/12 8:15am