Stephen Dowling

Sharks have survived all five of Earth’s major mass extinctions and possess far more complex abilities and social behaviors than commonly assumed. Research indicates that they can distinguish quantities, shapes, sounds and colors, learn tasks associated with music, form lasting social bonds and use sophisticated sensory systems to detect movement, electrical signals and possibly magnetic fields. Some species give birth after internal development, including cases of in-utero cannibalism, while their tooth-like skin structures reduce drag and help them investigate objects. Fossil evidence shows that shark ancestors existed hundreds of millions of years ago, making them older than trees, dinosaurs, Saturn’s rings and the North Star.

Sharks, among the planet’s oldest vertebrate predators, possess surprising traits developed over hundreds of millions of years of evolution. Research shows they can perform basic mathematical tasks, learn to associate jazz music with rewards, and have belly buttons due to umbilical development in some species. Some shark embryos practice intrauterine cannibalism, while others form long‑term social bonds. Their skin is covered in denticles that reduce drag, and they can detect heartbeats through specialized electroreceptors. Fossil evidence shows that sharks predate trees, Saturn’s rings, and the North Star, with around 500 species existing today.