![]() What came first fish or trees?ģ0 million years ago, the prehistoric fish crawled out of the water and began their evolutionary path. Scientists believe that the ring system was created by a giant impact between Saturn and its moon Titan. The rings are thought to have formed as a result of a collision between the two bodies. ![]() The rings of Saturn were formed by the collision of two large bodies, the moon Tethys and Saturn’s largest moon, Titan, in the early stages of the solar system’s formation. Sharks have been around for over 4 times as long as the rings on Saturn, which were only formed 100 million years ago. The average female shark has a brain the size of that of a small dog, according to a study published last year in the Journal of Fish Biology. They also have the largest brains of any vertebrate, with the average adult male shark weighing in at more than 1,000 pounds, and females weighing up to 600 pounds. Sharks are also the only vertebrates to have evolved the ability to breathe air, which is why they are so important to the ocean ecosystem. That makes them older than mount everest and the dinosaurs. Why did sharks survive when dinosaurs didn t?įour of the big five mass extinctions have been caused by sharks, meaning they have been around for at least 400 million years.
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