How are scientists certain that Megalodon is extinct when approximately 95% of the world’s oceans remain unexplored?

Question

Would like to understand the scientific understanding that can be simply conveyed.

Thanks you.

In: 5134

Answer 1

Same reason they think Dinosaurs are extinct: Lack of evidence of life.

There’s be some sort of evidence if they were around. Dead creatures, poop, scavenging remains, etc. There’s **none** of that. Only fossils that are verifiably old as crap. True, they can’t be 100% certain, but to the best of our ability to reason, it’s reasonable to assume in cases like this.