It is dark in the womb—but not that dark. Human flesh isn’t fully opaque, so some measure of light will always pass through it. This means that even an enclosed space like a uterus can be surprisingly bright. “It’s analogous to being in a room where the lights are switched off and the curtains are […]
Scientists for the first time have successfully edited genes in human embryos to repair a common and serious disease-causing mutation, producing apparently healthy embryos, according to a study published on Wednesday. The research marks a major milestone and, while a long way from clinical use, it raises the prospect that gene editing may one day […]
“From your first moments of existence, you had all the DNA that would determine your sex, facial features, physique, and the color of your skin, hair, and eyes. At 24 days, your heart began beating. By 8 weeks, all your organs were present, and your unique fingerprints were forming. Ultrasounds show that by 18 weeks, […]