Our galaxy isn't a flat disk -- it's warped like melted vinyl record. Learn how researchers discovered this and why they think it happened in this classic episode of BrainStuff.

Why Did the Massive Maginot Line Fail to Stop Hitler?
11:36

BrainStuff Classics: Why Are Some Americans Cancelling Columbus Day?
07:16

American Versus British English: What Are Biscuits, Muffins, and Pudding?
09:51