Sin brought death into the world. There was no death prior. People, animals, or otherwise.

"Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:" -Romans 5:12

The pre-flood environment and atmosphere (air pressure, oxygen, etc) was far different than what we have now, which is when man's age went from 900 years to 120 and finally to where it's at now. Fun fact: reptiles never stop growing. Imagine how big lizards get if they lived 900 years. Oh, that's right, we have actual skeletons, not to mention drawings and carvings from various cultures showing dinosaurs always lived with man. But they try to brainwash us when we're younger than five, as it seems all dinosaur stories start out with: "Millions of years ago." Satan has a counterfeit message to everything.

Sin brought death into the world. There was no death prior. People, animals, or otherwise.

"Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:" -Romans 5:12