Jen Keane’s claim to fame is that she grew a shoe using bacteria, coaxing the microbes to deposit their nanocellulose materials in the shape of a sneaker. But she’s kind of over that. “I feel like ...

Ironically, one great unsolved problem in Darwin's master work, On the Origin of Species, was just that: How and why do species originate? Darwin and his later followers were faced with a seeming ...