Ok, it might appear strange that I've made a site that is on my Links list as a cool site of the day, but if you click the Links you'll see that the link now leads to the Discover Credit card website (which I will change when I have more time). The reason is that Discover magazine has revamped its webpage, and for a limited time all of the magazine's content since 1992 is available for free without a subscription.
I'd take advantage of that while it lasts and browse around in the archives ... lots of great and interesting science stuff to find in there.
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