Rottweilers with lifelong hormone balance lived longer and faced less danger from frailty, showing how hormones shape late-life resilience.

A naturally occurring gene called Cyclin A2 (CCNA2), which turns off after birth in humans, can actually make new, functioning heart cells and help the heart repair itself from injury, including a ...

A company’s plan to edit the genomes of human embryos worries some researchers — but it might reflect the changing attitudes towards the controversial approach.