Non-Africans have less variants, presumably because their forebears migrated out of Africa as a small group with only a small sample of genes from the African gene pool. The researchers didn't look at DNA coding for athleticism, but there's little doubt it will also be more diverse in Africans. With more genes to choose from, nature can build a better athlete from African stock. So, give enough Africans the opportunity to play a given sport and it's inevitable one will emerge with the right genes to win the Olympic gold. Armour, J.A., et al.
Minisatellite diversity supports a recent African origin for modern humans.
Allen Unwin, Sydney. See excerpts in our TrainGain and CompEat columns. Contributed by Will Hopkins . JUST DO IT During a recent tennis match, Ferret's opponent praised her excellent forehand play. Ferret's grooved tennis swing did falter, so after the match she did a literature search on the topic.