New research reignites debate over the size of this extinct giant, also suggesting it looked unlike a great white ...

Close-up view of tiny placoid scales of the iconic extinct megatooth shark, Otodus megalodon, compared to a tip of a 0.5-mm mechanical pencil lead on the bottom right corner. Credit must be given ...

Sourced from Damodaran et al. (2016). For the boat hull application, the placoid scales of sharks are particularly interesting. They seem to not only prevent bacteria from attaching, but also ...