Scientists and fishermen in Brazil caught an “armored” river creature known to sting and discovered a new species, a study said. Photo from Willian Massaharu Ohara via Tencatt, Ohara, Carvalho, and ...

How does the armored tiling on shark and ray cartilage maintain a continuous covering as the animals' skeletons expand during growth? This is a question that has perplexed Professor Mason Dean ...