I can almost feel the excitement that the researchers of the Nautilus Exploration Program must have felt when their robotic explorer met this glorious sperm whale at 598 metres below the Gulf of Mexico. See more >
Shark skin is sleek and dragless, the envy of swimsuit designers. Perhaps less famous is what shark skin's oddly rough surface looks like up close: an eerie matrix of microscopic tooth-like scales. Now, scientists are 3D printing artificial shark skin in hopes of unlocking its swimming secrets.