Most of the animals were evolved from their original forms to modern during million years, and many of them are still evolving. Because the environment and many other factors are pushing them to evolve, some species are slowly evolving, and others are faster evolving. And some animals are least evolved. Because they don’t need to evolve, They are perfectly fit for the environment. So they can challenge evolution. Some of them are calling living fossils. Read till the end this article will be interesting for you.
CrocodiliansAncestors of crocodilians arose 200 million years ago…So they have outlived the dinosaurs by some 65 million years. They are called ultimate survivors from evolution. If you had watched any documentary about crocodiles, then you could almost hear the line, ” The crocodiles have gone unchanged since that time of the dinosaurs.” This is not the truth. But they were not evolved much from their original forms. As we know them today, the modern crocodilians, the various species like alligators, gharials, crocodiles that live at the water’s edge, have been around for about 85 million years. Today there are 24 species of extant crocodilians. The largest species of crocodile is the saltwater crocodile. Also, it is the largest living reptile and crocodilian known to science. Do you know? The female crocodile is called the cow.
The Duck-billed Platipus is another creature that has challenged evolution. We can find them through Australia. Australian indicate that there have been Platipus like forms since 110 million years ago. The
Duck-billed Platipus is a semi-aquatic mammal.
Cow sharkPathologies estimate that cow sharks have been around for at least 175 million years. There are five species of cow sharks. They have not changed much in 60 or 50 million years.
- Broad nose seven gill
- Bluntnose sevengill
- Big-eyed sixgill
- Atlantic sixgill
This is the best “survivor” from evolution. This crab is known as the “living fossil” in the earth. Because horseshoe crab wasn’t physically evolved, it is designed to live successfully for a million years. According to google, horse crab has existed for at least 445 million years. There are four species of horse crabs existing today.