There's hard problems, and then there's really hard problems. But it's hard to pin down the difference between them.
Masks (whether surgical, or N95, or cloth) are counterintuitive and actually work much better epidemiologically than one might expect. Here's why that's so.
The true story of a friendship that forever changed mathematics. In 1913, Srinivasa Ramanujan (Dev Patel), a self-taught Indian mathematics genius, traveled to Trinity College, Cambridge, where over the course of five years, he forged a bond with his mentor, the brilliant and eccentric professor, G.H. Hardy (Jeremy Irons), while fighting against prejudice to reveal his mathematic genius to the world.