I mean't of different species, like how wolves and dogs are capable of breeding.
You need to be 1.5 million kilometers ( 932,000 miles) from Earth before the Sun's gravity is stronger.
That is a REALLY good question. I don't know the answer, but here are some thoughts.
All animals evolve by a "survival of the fittest".
Having a good sense of smell, meant you could learn where your food was coming from, find your way home, recognise your friends etc.
Dogs/wolves did/do this rather well.
If … Read more
