Ask any biologist—sex seems like a waste. It’s costly: Think of the enormous energy that goes into producing a peacock’s spectacular fan-shaped tail, apparently meant to entice…

This was the moment Hilde Proescholdt had been waiting for. Peering through her bench-top microscope in 1921, she beheld the soft mass of a salamander embryo. Fertilized two days earlier,…

Last fall, I went to an egg freezing cocktail hour. The downstairs bar of the glossy SoHo hotel was thronged with women in heels and sleek business attire. Club music thumped, cameras…

To view the video, click the “play” icon above. On Feb. 19, 2012, journalist Charlie Foster told a deeply personal and thoughtful story to a rapt audience of complete strangers.…