These artists are operating outside of the formal networks of power. They were not sitting in Congress; they were not sitting on a horse leading the charge in battle.

"We're all kind of guessing about it because we've not gotten a real clear explanation," said AEI's Kevin Kosar.

For decades, researchers have been collecting samples from hundreds of thousands of women and tracking their health. The work has deepened our basic understanding of human health, but now the entire ...