The orca is one of only two species of mammals, besides humans, known to go through menopause. Biologists have long wondered what drove orcas to evolve this way. The reason has remained a mystery, but new research suggests an answer.
The orca is one of only two species of mammals, besides humans, known to go through menopause. Biologists have long wondered what drove orcas to evolve this way. The reason has remained a mystery, but new research suggests an answer.
