Sharks have been swimming in the oceans for over 400 million years. They were already ancient history by the time the first tiny trees started growing on land!
It is hard to imagine a world without forests, but for a huge chunk of Earth's history, the oceans were full of life while the land was mostly bare. Sharks are one of the ultimate survivors, having outlasted almost everything else.
This means sharks had already been patrolling the deep blue for nearly 100 million years before the first leaf ever rustled in the wind. To put that in perspective, sharks are also older than the dinosaurs and even older than the rings of Saturn!
Sharks have survived four of the "Big Five" mass extinctions. Their secret is their incredibly adaptable design. While trees had to evolve complex systems to stand up and move water against gravity, sharks perfected their hunting and survival skills in a stable underwater environment long before.
While they have changed over time (some ancient sharks had strange "anvil-shaped" fins or circular saws for teeth), the basic "shark shape" has remained mostly the same. Nature got it right the first time, and it has worked for hundreds of millions of years.
Sharks are true living fossils. They were already masters of the ocean long before the land was green with forests. They aren't just predators; they are ancient survivors that have seen the world change more than almost any other creature.
