Lab-made mouse embryos grew brains and beating hearts, just like the real thing

Scientists coaxed mouse stem cells to grow into synthetic embryos that began developing hearts and brains, just like the real thing. The lab-made embryos, crafted without any eggs or sperm and incubated in a device that resembles a fast-spinning Ferris wheel full of tiny glass vials, survived for 8.5 days. That’s nearly half the length […]