Sam Kean

The price of diamonds can vary greatly depending on size, cut, color, and other factors, including whether they have a history. But because of the rarity of blue boron diamonds, they often fetch more money than gems of similar quality.

The thing I always liked best about touring abroad was constantly running into different people, different cultures, different foods. It really pumped up my batteries... I'm constantly playing to a demographically diverse audience... one generation is driven by nostalgia, the next by curiosity. And that's why I have no plans to retire.

What do cells do when they see a broken piece of DNA? Cells don't like such breaks. They'll do pretty much anything they can to fix things up. If a chromosome is broken, the cells will repair the break using an intact chromosome.