A science reporter tested high school students with a 10 question science quiz developed by leading scientists. The quiz covered topics like the percentage of Earth covered by water, how the brain communicates, whether dinosaurs and humans coexisted, Darwin's theory of evolution, why a year is 365 days and a day is 24 hours, why the sky is blue, what causes rainbows, why diseases are hard to treat, the age of the oldest fossils, and why we put salt on sidewalks when it snows. Most students answered the questions correctly except for the question about putting salt on sidewalks to prevent freezing, which stumped most students.