It's not often you can see a letter written by George Washington, a limited edition Barbie doll and Groucho Marx's autograph -- all in one place. Eddie Arruza visits a new exhibit at the Northwestern University library.

Do you know someone with math anxiety? New research offers clues about what's happening in a brain that's anxious about math. Our science guy, Neil Shubin, has that story and more in Scientific Chicago.

The majority of Americans are already overweight. But a new study concludes that within ten years, obesity and diabetes in America will actually get much worse. We'll speak to some health professionals and take a look at the dangerous and costly expansion of America.

Hollywood loves it when giant rocks fall from space, but scientists assure us that the asteroid passing close to Earth tonight will NOT hit us. We have a close encounter with our science guy, Neil Shubin, who also has a little show-and-tell with a huge fossil.