Oldest shark teeth. The earliest shark-like teeth we have come from an 410-million-year-old, Early Devonian fossil belonging to an ancient fish called Doliodus problematicus. Described as the ‘least ...

Shark fossils date back more than 400 million years – that means sharks managed to outlive the dinosaurs, survive mass extinctions, and continue to serve an important role near the top of ...

Body size of the extinct Megalodon indeed off the charts in the shark world. ScienceDaily . Retrieved April 3, 2025 from www.sciencedaily.com / releases / 2020 / 10 / 201005005923.htm ...

Hammerhead shark study shows cascade of evolution affected size, head shape. ScienceDaily. Retrieved June 3, 2025 from www.sciencedaily.com / releases / 2010 / 05 / 100518113132.htm.