The Praying Mantis With the Ear

Tree frog embryos can detect rations of an attacking predator while they're still in their unhatched shell. They also distinguish between vibrations made by a snake nombing on one of their siblings and just wind, or even like an earthquake. So how on earth can they know that without having experienced it? Is that knowledge? It's got to be instinct. We'll see you next week with another episode.