Independence Day is the biggest grilling day of the year, and grill-masters all over the country are going to be putting their skills to the test. While grilling is an age-old technique, you can look to science to perfect your craft. On today's episode of Serving Up Science, science writer Sheril Kirshenbaum and WKAR's Karel Vega uncover the science behind making the best (and safest!) grilled meat.