To Believe — Hard

: While the Great Pyramids were being built in Egypt, woolly mammoths were still roaming the earth on Wrangel Island; they didn't go extinct until about 4,000 years ago.

: The Turritopsis dohrnii is a species of jellyfish that can theoretically live forever by reverting to its juvenile polyp stage after reaching maturity. Hard To Believe

Life is often stranger than fiction. From historical coincidences that feel like glitches in the matrix to biological oddities that defy logic, there are countless truths that are genuinely hard to believe. : While the Great Pyramids were being built

: Human stomach acid is strong enough to dissolve a single-edged razor blade in about two hours. From historical coincidences that feel like glitches in

: An average white, puffy cumulus cloud can weigh over one million tons—roughly the weight of 200,000 elephants. Impossible Survival & Human Oddities 17 Wild And Hard-To-Believe True Facts - BuzzFeed

: On Jupiter and Saturn, the intense pressure and heat in the atmosphere can squeeze carbon into diamonds, which then literally rain down toward the planet's core.