Human Gill Implants Should Be Considered For Navy Seals - Make Them Into Fish - by L. Winslow We should re-design humans because they simply cannot evolve fast enough to change with the modernization of civilization. Do you remember the James Bond Movie where the characters put a little device in their mouths allowing them to breath underwater? Well, it just so happens that they now exist and work quite well. Indeed, it would be very easy to use some of that junk DNA to grow gills or even implant such a device.