HealthTB's extraordinary evolution reveals why the ancient disease lives on Once thought to have originated in cows and spread through dust, the surprising evolutionary story of tuberculosis reveals why it's so hard to stamp out this ancient disease, writes Carl Zimmer Features
MindThe four types of imagination and how they create our worlds Your imagination isn't just one thing. The latest neuroscience is untangling just how diverse this faculty really is, says cognitive neurologist Adam Zeman Features