Mind-Blowing Facts: Sharks Existed Before Trees and Saturn’s Rings!

Did you know that sharks are one of the oldest ancient creatures on Earth? ​Based on fossil evidence, shark ancestors were already swimming freely in Earth's oceans approximately 400 to 450 million years ago during the Silurian period. This means sharks existed about 50 million years before the first trees ever grew on land! ​Not only that, the shark lineage is even older than dinosaurs and Saturn's rings, and they have survived all "Big Five" mass extinction events in Earth's history. #SharkFactsAncientSharksDidYouKnowEarthHistoryPrehistoricAnimalsMarineBiologyMindBlowingFactsScienceFactsNatureDinosaurs