/sci/ - Science & Math

all dogs are same subspecies despite being very different. some species are just more diverse than others for several reasons but generally it either has something to do with humans selecting or continually inhabiting vast geographic distances

people aren't 7 feet tall because it's not optimal for humans. but people with extreme proportions are perfect for international/national level sports so you see them a lot there.
between 190cm and 160cm (probably lower than 160) is the optimal height, anything above or bellow comes with trade offs.