Nature journal retracts 'game-changer' stem-cell study (Update)
Leading science journal Nature said on Wednesday it had withdrawn a flawed stem-cell study hailed when it was published in January as a "game-changer" in the quest to grow transplant tissue.
Probing Question: What is Bitcoin?
In 1729, when he was 23 years old, Benjamin Franklin authored a pamphlet titled "A Modest Inquiry into the Nature and Necessity of a Paper Currency." The revolutionary idea he advocated? Paper money printed ...