Francis Collins

The brain is the most complicated organ in the universe. We have learned a lot about other human organs. We know how the heart pumps and how the kidney does what it does. To a certain degree, we have read the letters of the human genome. But the brain has 100 billion neurons. Each one of those has about 10,000 connections.

Genes are effectively one-dimensional. If you write down the sequence of A, C, G and T, that's kind of what you need to know about that gene. But proteins are three-dimensional. They have to be because we are three-dimensional, and we're made of those proteins. Otherwise we'd all sort of be linear, unimaginably weird creatures.

To this day, my mom's unsinkable spirit is an inspiration to me. For nearly thirty years, she's worked at the Library of Congress. Everyone knows Sameha simply as 'Sami.' Along with 500 miles of shelved books, her closest friendships are cataloged in that library. They are as much the value of work to my mom as is the work itself.