DNA is the code of life. For something so important, I was surprised to find out the number of errors made every day. The environment damages DNA, and even our own bodies make mistakes when copying DNA while making new cells. All these errors should make life impossible, as we need error-free DNA to work properly.
This year's Nobel Prize in Chemistry has been won by scientists who've discovered ways our bodies repair DNA. Damaged DNA can cause cancer, so this information helps us understand cancer and design new drugs. I'm impressed!