Earth isn’t really that big, if you think about it. Biodiversity on Earth is really a wide span.
In: Biology
Humans are more similar to each other than other animals of other species who can still interbreed. Take dogs for example. Most if not all dogs can still interbreed and yet the variety amongst them is absurdly large.
Yes, some people are of different sizes or have different features but it is at worst on par with the diversity of other animals and realistically much less so.
You recognize more differences between people because you look at more people than you do birds or dogs.
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