Katsuhiko Hayashi pulls a clear plastic dish from an incubator and slides it under a microscope. "You really want to see the actual cells, right?" Hayashi asks as he motions toward the microscope.

What fertilization actually looks like under a microscope. The madness of George Will: Last lonely never-Trumper forges on 3 ...

Human eggs seem to dispose of their waste more slowly than other cells do, which may help them avoid wear and tear – and explain why they live longer. Every woman is born with a finite number of egg ...