Then by 10,000 - 7,000 years ago, or so, a great alleviation of 'environmental pressure' had began to spread throughout the world.... Civilization! And right now, though technology, there is very little of the environmental pressures that once plagued prehistoric humans.
So I declare, "Fly! Be free to express yourself Human Genome!!"........ But wait, that all stopped around 10,000 years ago???? Just as we began to give you freedom. That's weird? All that traveling, and all those expressions, with all the untamed environmental pressures restricting you, in just 30,000 - 50,000 years. And not a peep from you in the last 10,000 years??
*Now imagine how much change had to occur every 10,000 years of that period (that's only 3 -5 10k periods folks)....... And ask yourself, "why none in the last 10,000????"
By 'evolution' standards and philosophy, there would be an *EXPLOSION* of expressions. And the "humans are muddied-up" excuse will not fly, because even thought there is a small to moderate mixing of races... In large part the human population is propagating within their own people and regions.
Also humans have not become taller, nor do they naturally live longer than ancient humans in civilizations. Average population ages are due to living conditions and advancement in life-prolonging technology, not changes in the genome.
Evolution is a scam.
*****Oh and your science teacher will not appreciate these facts... So I would just keep your mouth shut, and 'learn' as much as you can about it. Confrontation is futile in the public education system on the subject of evolution. You may find it maddening to pretend to accept some of their obvious discrepancies, but it is far better to know everything you can about it, to understand what is actually happening. I challenge you to be the best student in the class!!! The ultimate burn!