Human beings like to think that we got where we are on the evolutionary ladder through the power of our own ingenuity and our ability to punch the rest of nature into submission. But evolution doesn't work that way -- we humans are what we are due to help from a series of creatures most of us have very little respect for. So let's take a moment to appreciate the fact that ...
5Dogs Helped Us Beat Out Neanderthals
To understand how dogs' ancestors totally saved humanity's collective ass, you have to go back about 40,000 years to when Neanderthals and modern humans walked the Earth at the same time. Contrary to popular belief, Neanderthals weren't the stupid oafs many assume they were. Just like early humans, they knew how to use tools, make fire, and practice social rituals. That's better than most of us could manage today if tossed out into the wilderness.
Most of you would be 80 percent of the way dead by this point.
In fact, they even had similar-sized brains, indicating that they likely had a language. But one striking difference between the two species was that humans lived and worked alongside dogs, while Neanderthals had a much less subtle use for canines (i.e., dinner). The addition of dogs into a hunting party has been shown to increase food yield by 56 percent, giving early humans a huge advantage over the competition.
But they couldn't have just stolen young pups from their dens and trained them into domestication. It turns out that domesticating a wild wolf pup is incredibly difficult and time consuming, even for modern humans. People of the Mesolithic period had better things to do. Luckily, the wolves came to us -- when humans began to build settlements instead of living a nomadic life, one of the ultimate side effects was that waste accumulated. Wolves just loved eating themselves some garbage, since it was way easier than hunting.
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Then, as now, no dog could resist the allure of old pizza boxes and tampons.
As wolves ventured closer to human settlements for a taste of that sweet, sweet waste buffet, they evolved to become less afraid of humans. They also, amazingly, evolved the ability to read human gestures and follow the human gaze. If we point or look somewhere, a dog will focus in that direction as well (try that with your stupid cat). As these dogs bred, these traits were passed on to future canine generations and amplified, eventually ingraining their benefits into human culture forever.
At which point they began the transition from alpha predator to alpha sidekick.
Meanwhile, the Neanderthals all died. You do the math.
4Pubic Lice Made Humanity Lose Its Fur
For as long as humans have walked the Earth, lice have been right there with us. Indeed, many creatures carry lice, and each animal has its very own species. Human lice, cat lice, wombat lice -- they're all different. So you might find it scary to learn that humans have not one but two species that can live on our bodies. Head lice and pubic lice are the ones we have to contend with, but while head lice are little more than an itchy inconvenience that you can avoid by improving your standard of social circle, pubic lice are a burning, infectious nightmare, so much so that our ancestors lost most of their body hair just to get rid of them.
"Cave wife go with shaved look. Ugg like."
"You sick, Ugg; stay 'way from my kids."
Scientists have discovered that we originally caught the human pubic louse from gorillas. But before you get any uncomfortable ideas, it probably didn't happen the way you imagine -- back when our ancestors were covered in thick body hair, we only needed to spend time hanging around gorillas, hopefully platonically, to catch a case of the King Kong crabs. And back then, what we now know as pubic lice were actually whole-body lice. Let that idea sink in for a minute.
Centers for Disease Control and Prevention
"I'm still gonna focus mainly on your junk, but just know that I've got options."
With two different kinds of lice re-enacting the Battle of Helm's Deep on our bodies, the irritation was enough that we evolved to shed most of our body hair in order to segregate the factions to opposing sides of the body. The head lice were free to rule from the neck up and can only survive on the human scalp. The pubic lice were king of the crotch, using the thicker hairs to hold on with their big claws. The armpits, the only other place where pronounced body hair exists, are presumably the Demilitarized Zone. And that's how humans came to look the way they do today: thanks to hordes of tiny crotch-biting insects.