10 Terrifying Creatures That You’ll Be Glad Are Extinct

10. Megalodon

Let's get everybody's favourite swimming nightmare factory out of the way at the very beginning. Megalodon has gained public notoriety thanks to countless works of fiction playing on our inherent fear of apex predators with countless rows of razor sharp teeth (weird, right?). With a name that literally means "Big Tooth", this is unsurprising.

It is believed that Megalodon could grow to up to 18 metres (nearly 60 feet) in length, dwarfing modern great whites, the largest of which measure in at a measly six (but are more commonly around four).

Megalodon may have feasted on prehistoric whales, dolphins, giant turtles and basically anything else it damn well pleased. Its enormous jaw, lined with 18cm teeth had the strongest bite of anything to ever live and could pulverise a whale's skull with ease.