There wasn’t a “first homo sapiens.” Evolution works through populations, not through individuals. You are the same species as your parents, and they are the same species as their parents, and so on. A million years ago, someone was the same species as their parents, and so on…but if you compare that million-year-old someone to *you* you might conclude that you’re different species.
There are no hard lines that divide species over time. It’s all just gradual change over thousands of generations. A million years ago they were all *homo erectus* and over time since then, they gradually started looking more and more human-like, until today. There’s no point where you could look at a pair of mates and say “the parents aren’t *homo sapiens*, but their baby is”. That never happens. Speciation is slow and gradual. Babies are always at most just slightly different than their parents. A small mutation here, a small mutation there, and it snowballs over thousands of generations until there’s been so many mutations that the great-x10000-grandchildren look hardly anything like their ancestors.
Think of infants growing into an adult. Do you see changes everyday in them? No right? But if you were to see one couple years apart, you can surely see huge changes.
Evolution is same. There is hardly any difference between current and next generation but over a long long period the changes accumulate.
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