@RightWingCope From a biological species concept, once two groups have diverged enough to be unable to produce viable offspring (offspring survives and can itself produce offspring) then that marks the formation of a new species. This is more morphological and that has weaknesses. Also racist
@ShmeatSnacks Iโve figured this out! Get one of those thick ass ice packs that usually come when you order frozen food. The foam ones. Freeze and wrap in towel and place on back or neck. Your body temp will feel cool in the horrible scorching heat of the summer