Revolutionary Evolution Evolution in animals over time

Animals have to change and adapt in order to survive on our harsh planet or they will go extinct, vanquished for eternity. The process of changes in organisms over many generations is called evolution. Changes in animal’s characteristics happen for many reasons. If an animal can adapt to better devour food, or better dodge menacing strikes from predators, it will thrive. Evolution is a phenomenal process that changed the organisms we live alongside with today and will continue to do so over time.

Ready, Set, Sea!

First, life first came to be in the great blue seas. It began humbly with single celled organisms. Soon multicellular animals developed, such as the trilobites. Just because these creatures were old, doesn’t mean they weren’t really cool. Anomalocaris was a predator that broke apart the shell of its prey with its long, ferocious, mandibles. Organisms took much longer to take to land. The seas were a better recipe for life than the land. There were many factors for this. But eventually they did, as insects and amphibians. Amphibians evolved from fish. Life was not as diverse and evolved in the early seas.

That was a trilobite.
“It is a curious situation that the sea, from which life first arose should now be threatened by the activities of one form of that life. But the sea, though changed in a sinister way, will continue to exist; the threat is rather to life itself.”

― Rachel Carson, The Sea Around Us

Increase in animals

Second, Life evolved into many branches. A common ancestor is the first organism that evolved into the chosen group of organisms. The primate common ancestor goes back to 70-80 million years ago. It was small and solitary. Dogs evolved from wolves 33,000 years ago, which is more recent in the scale of life. The evolutionary tree is not so simple, as it starts to get confusing with one animal turning into another animal, and that form turning into yet another type of animal. But what is important to know is that different forms of animals split up into what we have now at the end. Life evolved into many varying versions of unique animals.

Current Creatures

Also, Evolution affects the organisms we share our world with today. As I mentioned earlier dogs evolved from wolves. If they did not, who would we be sharing our homes with? Not vicious, teeth baring wolves I hope. Without evolution, Sparky would not exist. If you think this does not relate to you, it does. This relates to all living organisms. We evolved from other primates. If this never happened, I might be a chimpanzee. That would be bad because there would be no improvement to our lives, just eat and try not to be eaten. Also the common ancestor of mammals as a whole existed because of evolution. Synapsids, a group of reptiles, turned into mammals. Nothing would exist the way we know it. No pigs, lions, or whales. You don’t have to look far to find that proof of evolution is all around us!

Pictured right: Dimetrodon was a synapsid.

“One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.”

― Charles Darwin, The Origin of Species


In conclusion, life has changed a lot over the course of the evolutionary tree. From single celled bacteria to complex beings with emotion, a far wider horizon of organisms exist now. Evolution is important to all of us as it changed the course of the modification of life.

Life that lives on our planet was and will continue to be heavily affected by evolution.


Created with images by UNE Photos - "Anomalocaris painting" • James St. John - "Paraceraurus exsul fossil trilobite (Asery Formation, Middle Ordovician; St. Petersburg area, Russia) 1" • Dallas Krentzel - "Dimetrodon grandis at the Evolving Planet exhibit at the Field Museum" • skeeze - "world earth planet"

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