Frost-free freeze physics--it's more than a tongue-twister.
The question of why particles have mass is one of the greatest problems in science today. Learn about "Higgs Field" on this Moment of Science.
"Where Is Everybody?" Learn about the Fermi Paradox on this Moment of Science.
Let’s say you hard-boiled some eggs last night to make egg salad. But today, when you open the fridge, you discover that a helpful family member has put them right back in the carton along with the raw ones. Without cracking the eggs open, how can you figure out which is which?