5 species of 'living fossils' - millions of years have not changed

Although mammals are high-class organisms, that doesn't mean they all belong to the "modern" era.

While most genera, the branch of the zoo are trying to evolve to adapt and develop, a small part of "fighting odd" , choosing to keep the old way.

They may be disappearing, maybe "the grandchildren" . There is only one other thing that has not changed, which is all still the same as the ancestors from tens of millions of years ago.

1. - not suffering from troublesome diseases

Platypus (Ornithorhynchus anatinus) is endemic to East Australia. They belong to both living and terrestrial forms, eating insects, worms and small crustaceans.

This is a very special animal. They belong to the beasts, but they lay eggs, then raise them with breast milk.

More specifically, they are poisonous. However, only males have poison, in the back leg, and can cause terrible pain when being stabbed.

And the most special thing is the time they exist on this Earth. Fossil studies indicate that platypus is present on the earth from about 19 to 48 million years ago. They split into several branches, some subspecies are extinct, but they are not fundamentally different from today's platypus.

Part of the reason is that they rarely get sick, so there's no need to work hard to do anything for . tired.

2. - faded but still unchanged

Although called beavers, mountain beaver (Aplodontia rufa) is not necessarily beaver. They are rodents that still belong to the past 25 million years ago. Calculated, mountain beaver only similar to normal beavers today in that they also like to nibble bark.

Mountain beaver eat all kinds of leaves but most prefer fern leaves. They have a habit of forgetting food to the store to save.

Unlike the modern "modern" beaver, which wakes up and spits to prevent water from damaging houses, the beaver mountain digs deep in the ground. They also invested about 10 exits for each cave.

Unfortunately, the expansion of human agricultural land is making the mountain beaver habitats narrow. In addition, they are also susceptible to hunting by predators. Therefore, the number of mountain beavers gradually decreases.

Their adaptability to the environment is really poor, not to mention being attacked by parasites such as fleas. Yet 25 million years passed, they did not change to survive better.

3. Weasel Opossum - fake death spirit

Unlike the mountain beaver, the original Opossum (Didelphimorphia) is really true - still like 60 million years ago - but not decaying. They are so numerous that preliminary counting is also about 100 species, which species are like the Nguyen.

The most unique feature of the Opossum weasel is its ability to fake death. In fact, the Opossum weasel does not "fake" but die unconsciously, whenever panic strikes.

In the state of fake death, the Opossum mink snout drips green drool. It was so stinking that every other animal had to be terrified and backed away.

4. Tooth shrews - benefits from extremely bad smell

The toothed shrews (Solenodon) are a really ancient species, so much so that one must call them "living fossils".

The toothed shrew that you see today is just like the toothed shrew that is present on Earth 75 million years ago. They all smell so bad that they want to vomit.

The toothed shrews are also on the list of rare mammal species. Its venom lies in its fangs, like a snake. And despite blind blindness, the toothed rat is still a beneficial species. They only eat insects and worms.

5. - no nipple still feeding the baby with milk

Echidna (Tachossaidae chidnas) is a long-beaked echidna that belongs to the same platypus. Therefore, it also spawns eggs instead of laying babies.

After evolving into a land-dwelling species about 20-50 million years ago, the Echidna's growth also stopped there. He still had a duckbill, but he only liked ants and ate termites.

Although he is very passionate about ants, Echidna doesn't dream about his roots with anteater.

In the mammalian family, Echidna has no nipple. Even so, he still raised his baby with milk, by secreting milk out like sweating on the skin of his chest.

Male Echidna is even more strange. Its genitals have up to four heads, each of which can alternate with each other to increase fertilization during intercourse.