Imagine you're an animal attending your evolutionary family reunion (just pretend that's a thing for the sake of this article intro, OK?). You might be surprised to find out how remarkably similar it is to your last family reunion: You spend the day trying to avoid "that guy" that no one wants to admit you really are related to, while the rest of your relatives randomly eat, fight or hump each other.
Here are five (more) of those "that guy" relations in the animal kingdom that prove evolution just likes to mess with us.
5Dolphins and Hippos
The cetaceans (whales and dolphins) are some of the most beloved and respected animals in the world. Whales are the gentle giants of the sea, while dolphins are the fun-loving clowns who show up in a lot of female tattoos, despite the fact that they maybe also are serial killers.
Now we all know that these regal creatures are mammals, so they're not as related to fish as you might otherwise think. But it would be safe to assume that their closest relatives would have to be 1) aquatic and 2) not huge lazy fatasses, right?
Closest Living Relatives: Hippopotamuses
We really hope this isn't some sort of hipporgy.
Well, that first assumption was semi-right, but we were way off the mark on that "huge lazy fatass" part. Just don't tell them that to their faces.
According to recent evidence, whales and hippos probably share the same great-great-great- (ad infinitum) grandpappy that lived about 50 million years ago. This ancestor split into two groups: the cetaceans and the anthracotheres. Believe it or not, whales and dolphins used to walk on land and were semi-aquatic, like crocodiles and otters. Here's a bad drawing of an Ambulocetus, an early whale ancestor:
It turns out the distant past was kind of a huge nerd.
Now, here's an early anthracothere:
Well, Danny DeVito makes a lot more evolutionary sense now.
It's sort of like a hippo that tried one of those new fad diets and got even dumber as a result of the lack of nutrients. Anyway, over time the cetaceans became more and more aquatic, until they eventually abandoned the land altogether. Meanwhile, the anthracotheres died out (presumably slowly and lazily), leaving only one descendant: the hippo.
In fact, scientists have argued that dolphins and whales should be combined into the order Artiodactyla, which contains not only hippos, but also deer, camels, cows, pigs and giraffes. Yet, if you came across a whale humping a camel, you'd think it was weird.
But hey, we're not here to judge.
4Bears and Seals
We humans have a very odd relationship with bears. On the one hand, we put our kids to bed with a stuffed one every night; on the other hand, we'd shit our pants if we ever encountered a real one out in the wild. Take that big guy standing up there, for example: Have you ever seen another photo that simultaneously says "Hug me" and "I want to gnaw on your sweet, sweet face-meat"?
So you're probably thinking that, since bears are somehow concurrently cute and badass, their closest relatives must also be equal parts both, right? Well, Mother Nature doesn't always work that way.
Closest Living Relatives: Pinnipeds (Seals, Sea Lions, Walruses)
Any bear smiling like that just devoured a hiker.
Actually, it looks like bears' closest living relatives have all the cute, but got severely shafted on the badass. The pinniped's location in the evolutionary tree has always been a little tricky, but genetic evidence revealed that pinnipeds are closely related to bears and weasels.
"But Cracked," you say, "seals don't even have freaking feet. You don't have to be a biologist to call bullshit here."
True, but have you ever taken a close look at a seal's flipper? We're guessing that's a no, so here's a pic:
"Down low -- TOO SLOW!"
Now here's a bear's paw:
The seal's flipper is flatter, and the bear's claws are longer (raise your hand if you knew that seals even had claws), but other than that, people who are way smarter than us yet spend a whole lot more of their time staring at animals' feet have found that they're very similar. Both have non-retractable claws, both have five claws on each foot, both have the same basic bone structure and both are plantigrade (meaning that both the heel and toe touch the ground).
In fact, the fossil record indicates that the pinnipeds probably arose from a bearlike ancestor called Puijila, which was a powerful predator that could run on all fours like a bear but also had webbed toes, allowing it to hunt in the water. Today, pinnipeds are rarely found in freshwater and, needless to say, they gave up on all that "running" bullshit long ago.
Perhaps one day, if we couch potato hard enough, we can reunite with our wiser brethren.
Just think: If Puijila had taken a different turn on Evolutionary Road, we might have bears that could outrun, outclimb and outswim you before using their cuddliness to lure you straight into their pointy bits.