In addition to the gonads, the placement/doubling up of sex organs with waste removal is a pretty big drawback. As one comedian said it’s like putting an amusement park next to a dump.

My least favorite feature these days is how ill equipped our backs and hips are for standing completely upright or retaining their posture while sitting. I suppose we’re meant to be crawling, walking or lying down at all times but that really cuts into my sittin around time.

Who are you to say it was a mistake?

Pretty sure all vertebrates except mammals have internal testes...& I can't think of any mammals that don't. For some reason sperms have to stay cooler than the rest of a mammal's body, yet birds are warm blooded.

Another apparent (& cruel) evolutionary mistake--the size of newborns' heads v. the size of women's pelvises. I guess large headed babies had a big enough evolutionary advantage that it outweighed a certain percentage of them dying (along with their mothers usually) during birth.

So it's not just longterm & short term benefits, but also numbers--grazing animals' normal diets are high in fiber & low in nutrients, so they're drawn to foods like grains & lush new vegetation that have more nutrition & calories. This helps their survival & ability to produce more offspring, but sometimes if there is a lot of rich food available at once they can (& do) eat enough of it to kill themselves. Overall, a taste for rich foods is good for the species but not always for individuals.

As far as the planet may be concerned, and the species with which we share our island home, the human brain may turn out to be rather less the crowning glory of evolution that we assume. As marvelous as the human brain is, the intelligence it houses is unlike any other. Our intelligence lies in the ability to exploit the environment entirely for our own purposes. We have the ability, beginning with the breaking of flint rocks to exploit the characteristic sharp edges their particular geological properties produce, to impose our will upon the surroundings in which we find ourselves or into which we wish to move, from striking sparks to make fire to the design of deepsea bathospheres to explore the oceanic deeps. In the process we produce global atmospheric pollution, nuclear waste and the threat of thermonuclear extinction, billions of tons of non-biodegradable plastics that increasingly foul the oceans (together with nitrogen run-off from agrobusiness and crude oil) and, as these break continue to break down into micro-fragments, ever more air pollution and ingestion.

Next to that, external testicles seem small potatoes.

Well I dunno that i can comment much about testicles but I think the little toe should have gone by now. How often have I accidently kicked it on a table leg or chair?

And words of caution, "go slower, til we find out more", fall on greedy and manipulated ears.

Mosquitos

I once loved a man with really long testicles. after the initial shock, they were kind of a turn on!

External testicles: critical to the continuation of the human race. How else were you going to cool down the sperm?

Evolutions worst mistake was the human brains ability to advance to a state in which its greed could be utilized to its full extent derived from the technology it developed ,therefore causing over population and eventually the next great extinction.

When you watch infinity war and come out of it agreeing with thanos that's when you come to realise that maybe it's not moral or ethical to try and save lives that humanity's greatest failure is empathy maybe the worlds to crowded and the well meaning efforts of humanitarian organisations are just prolonging the suffering of groups of people living in areas not suitable for that many people. If you left 90% of the population to starve and die well there's more than enough resorces for the survivors to prosper but that's not moral to a species with empathy.

Of all the species we know of including those that have died off wouldn't you say we're the most successful where evolution is concerned? Aren't we the shining achievement in evolution's billions of attempts?

These flaws may play a part in the human race's continual evolution.

Evolution requires turnover, so fatal design flaws are a feature, not a bug.

Well so much for Christian idea of perfect in God's image. I think our species is a work in progress and we have a long way to go if we don't kill each other off first

Interesting. Will read more

And they develop Their "Own Mind" at puberty.

That's a kick in the balls.

And the fact that we can't heal our teeth's enamel has caused more deaths than car accidents... Granted, not as bad since the advent of modern dentistry, but still. And it's been said that if you live long enough, your guaranteed to get some form of cancer. If we were "intelligently designed" the designer was a rank ameture who should have been fired for cutting corners.