Quick Take Preserving the northern white rhino now requires overcoming functional extinction, as there are only two females ...

The tragic news of the loss of the world's last remaining northern white rhino begs the question: Can it be brought back?

As you age, your fertility slowly declines. By freezing eggs or embryos when you’re young (usually under the age of 40), you can preserve your eggs’ health and, through in vitro fertilization (IVF), ...