Among those interested in these types of gene edits, other than cattle breeders, are athletic directors. Pushy parents who want champion children are sure to follow. Especially by using germline editing, they might produce a whole new breed of athletes with bigger bones and stronger muscles. Add to this mix a rare gene mutation that was discovered in the Olympic champion skier Eero Mäntyranta. Initially accused of doping, he was found to have a gene that increased his number of red blood cells by more than 25 percent, which naturally improved his stamina and ability to use oxygen.
