With the highly polarized state of the microblogging website, a user, Vanessa (@Nessakins_), made a brave yet benign joke about her restaurant bill. Expand Tweet Vanessa, who is a biochemist, shared a ...

Polson biochemist Ed Gannon nudges a nondescript gray chunk of rock, and then shakes a pile of round pellets into his hand. Both contain phosphate – a nutrient formed millions of years ago that’s ...