Feb 25, 2015 10:00 AM EST
Lemur Scents Reveal Whether Mom Will Have a Boy or Girl
Humans use ultrasound to check whether a mom-to-be will have a boy or girl, but even ultrasound doesn't always get it right. With lemurs, though, it's easy; scientists have found that you can tell whether a pregnant mother will have a boy or a girl by her scent.