Life on Earth emerged billions of years ago as cellular organisms evolved into some really weird things. It went through the childhood phase of trilobites and those swirly ammonites, followed by the awkward fish phase, the amphibian phase, the rebellious dino era, the big fluffy adult mammal years, and now we’re here — the geriatric hairless monkey era.

Throughout all these epochs, nature has experimented with extraordinary monsters, and now we’ll show you some of its scariest creations.

1. Gigantic Danger Noodle — Titanoboa

Did you know that the largest modern snake (in captivity) measures 25 feet and weighs 350 lbs? Now compare that to the Titanoboa: according to the fossils found, this 42-feet-long danger noodle could possibly weigh around 2,500 pounds. We don’t know for sure what their diet consisted of, but scientists believe Titanoboa primarily fed on fish. It could certainly swallow a few adult humans without even dislocating its giant jaw.

2. Anvilhead Shark — Stethacanthus

Speaking of sharks, there’s another weirdo you have probably never heard of — Stethacantus. Most of the representatives of this fishy family look very similar to each other, even when you compare today’s species with the extinct ones. But there were a few notable outliers that just don’t feel real. The Stethacantus had a dorsal fin shaped like an anvil. Why would they ever need something this cumbersome? We will never know.

3. Monster Shark — Megalodon

If you thought sharks were scary, you really don’t want to let a Megalodon catch you by the ankles. Yes, it is extinct, but you never really know what’s swimming right under your feet. Just so you can imagine what this thing was like, think of a Great White shark and now make it bigger. When you reach 70 feet, back up a little. That’s around 20m in length for all you metric fans. Researchers say that if it wanted to, a Meg could have opened its killer jaws so wide, it would easily swallow Shaq whole.

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