Understanding Genetics Unravel the mystery of your genes with this top-notch primer on the science of DNA. Presented by California's Tech Museum of Innovation, the site's packed with nifty graphic displays and helpful "How Stuff Works" explanations. The "Ask a Geneticist" section addresses some standard-issue questions about eye color and tongue-rolling ability, but the discussion of Parkinson's disease raises intriguing questions: Did multiple head injuries contribute to Muhammad Ali's Parkinson's? Why are cocaine eye drops (!) effective in detecting the disease? On a general note, we were surprised to learn that humans share 15 percent of their genetic make-up with mustard grass (anything over zero seems kind of high), and have an 85 percent genetic overlap with zebra fish. Zebra fish? (in DNA and Genetics)
