The Tyrannosaurus Rex (T Rex) lived closer in time to humans than it did to the Stegosaurus. This is due to the long gap in time between these dinosaurs.
Poisonous Animals
Golden poison frogs are extremely poisonous. One frog contains enough poison to potentially kill 10 adult men, highlighting their lethal toxicity.
Pineapple Enzyme
Pineapples contain bromelain, an enzyme that digests protein.
When you eat a pineapple, the bromelain digests the protein in your mouth, effectively "eating you back".