Speaking of evolution, for most living things, it is definitely a matter of fate, the way of survival. The competition of large animals on land is particularly fierce, and it is even more difficult to seize the ecological niche, after all, the laxity of the beard is the extinction of life and death. But there is such a large type of breastfeeding as if they have been playing time, and most of their evolution is like opening a blind box, but they can always rely on each other and win the world.
That is the ungulate animals, today all the animals with hooves mostly belong to this big family, including pigs, cattle and sheep, can be called the best friend of mankind, but the diversity of even-hoofed animals, by no means the three dishes and a soup on your table.
Nowadays, some scholars have suggested that even-ungulates be called whales, because the feet of the cetacean ancestors, indohos, still have hooves on their feet, and cetaceans are also an evolutionary branch of even-ungulates, and the legend of Indian fawns devouring and mutating into giant carps. Think about it, even if you can change your own magic into a fish, this way is not an ordinary wild.
Soon after the arrival of the Great Meteorite 66 million years ago, the ancestors of the even-hoofed animals rose rapidly; they scattered throughout the ruined forests of the Northern Hemisphere, but then they tossed such a dream into a sleepwalking start; as sentient beings recovered, the high and low like omnivorous food could be said to be increasingly crowded.
By 55.5 million years ago, the Paleocene Eocene extreme heat event (global temperatures once climbed at a rapid pace, leading to sea level rise, increased ocean acidity, and the permanent demise of some species. Forests around the world are lined up, and the offspring of those who survived were forced into chicken-eating mode, but even so, one ungulate animal still made a leap forward in the omnivorous niche. That is the pig-shaped suborder.
(it is pigs), but this is not because of their head iron, but because the pig-shaped suborder has its own unique secret skills, pig nose, with a huge nasal cavity, pigs have also evolved the first mammalian olfactory receptor species, thus developing the first sense of smell on the land, with the developed curved fangs, from then on, whether it is deeply buried underground fungi, or insects hiding in tree holes, all let the pig arch. During this period, a lot of deformed fangs also erupted, and two pairs of fangs grew, one pair of normal growth, one pair of molds and over-grown on the nostrils, if you want to ask why, of course, it is for fighting! (No matter what kind of ungulates become, their hearts are always thinking of only one thing: fighting; crazy mutual heads))
In 34 million years ago, the Earth's climate suddenly plummeted, the rainforest that had flourished for thousands of years since the Eocene Extreme Heat Event in the Paleocene gradually collapsed, and the earth entered the season of grass, and the grass was tougher than the leaves and difficult to digest, and the edible experience was extremely poor, making a large wave of plant-eating animals around the world directly GG, and finally dragging down the entire ecosystem, known as the Eocene Oligocene extinction event.
After this wave of disasters, the even-hoofed animals have never been different, they have developed their own exclusive wealth code, rumination, simply put, their esophagus swelled up some chambers, incorporated a lot of digestion-aiding microorganisms, so that they can swallow the rough teeth of the grass first, initially digest, and then spit out and chew carefully. A clolate animal pushes the rumination ability to the extreme, that is, the ruminant suborder represented by cattle and sheep, their esophagus has evolved three additional stomachs, taking cattle as an example, which are hairy belly, money belly, grass belly (the scientific name is not easy to remember); these stomach walls are full of folds, fully improving the contact area between microorganisms and hay, rumination can not only effectively reduce the wear and tear on the teeth, but also can be swallowed by the grass first and then chewed slowly in a safe place, which greatly reduces the risk of being attacked by predators when eating. From this, the occasional animal can finally fight happily again! For example, the ancestor of the giraffe, the short-necked giraffe, which is still in the mortal world, is left with only one species of hoga.
Okapi
Even-hoofed animals like to fight and shake each other's heads, and the ancestors of giraffes are certainly no exception, but this wave has obviously overplayed and begun to use their heads as meteor hammerstones;
Giraffe fights
Just as the so-called Dao was one foot high, the devil was one foot tall, and finally the Douzong strong man of the giraffe family evolved to have a neck as long as a shred; then they found that this long neck was quite convenient to eat leaves, and there was today's giraffe.
Most of the ruminants have a wilder path, and they point their skills at the horns, because this fight is so bad. Just look at the horns of extant ruminants and have long thicknesses. Forked straight curved spiral, deformed species can be described as a competition, really the calcium saved from the tooth gap is used in the bells and whistles, and many deer will suffer from osteoporosis because of seasonal long horns, and even, after the breeding period, they also have to supplement calcium by nibbling on the lost antlers.
Even-hoofed animals are really a group of very unexpected animal groups, other animals are desperately studying how to eat, how to escape, but even-hoofed animals seem to be a mind on the fight, other animals appear exaggerated appendages, often means that their evolution has been exhausted, and even-hoofed animals have completely trampled on this historical law, other animals when they are alive have tried their best, even-ungulates are always idle.
When I think of the story of the deer turning into a giant carp, I can't help but feel that evolution is really mysterious, special, and makes people reverie the catwalk!
Tips: (Evolution is the survival of the fittest in nature, not a choice)