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What is fitness in evolutionary biology

October 8, 2020 By Maris Munkevics Leave a Comment Filed Under: Evolution

a cheetah running has high fitness

What is this “fitness” the evolutionary biologists often talk about? When something good occurs to a living being, it gains fitness — like if it works out at the gym. Indeed, the meaning isn’t far from that, because going to the gym undoubtedly can improve fitness. Or lose it if you don’t know what you’re […]

Why evolution isn’t perfect and giraffes don’t evolve even longer necks

September 2, 2020 By Maris Munkevics Leave a Comment Filed Under: Evolution

Evolution has an odd way of appearing to be a perfect process, and with good reason. Many things in the natural world fit like a glove on a hand. Terms like ”natural selection” and “survival of the fittest” imply evolution is a goal-oriented process, with the goal being perfect adaptation to the environment. But is […]

What is natural selection and how does it work?

August 12, 2020 By Maris Munkevics Leave a Comment Filed Under: Evolution

natural selection in process

Natural selection is one of the main driving forces of biological evolution. In the first article of my evolution series, you learned that biological evolution occurs mainly due to random mutations when organisms copy DNA. While random mutations should result in random changes, most evolutionary changes are not even close to being random due to natural selection. But what is natural selection?

What is a molecular clock and how does it tell evolutionary time?

July 13, 2020 By Maris Munkevics Leave a Comment Filed Under: Evolution

dna molecules can tell time

If you’ve ever wondered how can scientists determine the relatedness of different species and how much time has passed since they diverged, a molecular clock could have come on your radar. What is a molecular clock and how is it used? Let’s find out.

What is a species?

April 16, 2020 By Maris Munkevics 2 Comments Filed Under: Evolution

ducklings or goslings

Do you think you know what species is? If you see two different animals, they belong to two different species. Or do they? Is this an “ugly” duckling in the picture, or is it just a different kind of bird? On the surface, term species appears to be precisely defined. I know that often even biologists fall into thinking it is. Yet it isn’t.

How do viruses evolve and why it happens so quickly

April 3, 2020 By Maris Munkevics 2 Comments Filed Under: Evolution

artistic illustration of red flu virus

As I write this, there is a large pandemic of coronavirus spreading across. Congratulations if you are lucky enough to read this article several years in the future! I’m a biologist with a special geekiness towards ecology and evolution. What else should I write about if not the evolution of viruses?

What is evolution and how does it work

March 30, 2020 By Maris Munkevics Leave a Comment Filed Under: Evolution

Pearse's mudskipper - a fish that has grown legs throug hevolution

Evolution, in a literal sense, means change. Anything can change and thus evolve, right? One of the first videos on Youtube was “Evolution of dance,” and since then, youtube has evolved itself a lot. Pokemon evolve, our personality can evolve, and apes and monkeys can evolve, too. At the same time, usually, when someone refers to evolution, they mean the biological one.

How do new species evolve through isolation

October 4, 2019 By Maris Munkevics Leave a Comment Filed Under: Evolution

allopatric speciation: new species arise through isolation

Even if you understand the basics of evolution, a way how new species evolve can remain a mystery. It’s easy to imagine how the length of a hummingbird’s beak can lengthen through generations, but how can this lead to new species?

Why natural lifestyle isn’t necessarily the best for you

July 24, 2019 By Maris Munkevics Leave a Comment Filed Under: Evolution

Mortar with herbs and oil

“Avoid gluten in your diet, because our ancestors did not eat it, and neither should you!” “Rub your face with mud; early humans literally lived in it.” Similar statements are trendy as more people follow the seemingly reasonable logic that natural things are good and unnatural things are not.

If humans evolved from monkeys, why are there still monkeys?

June 6, 2019 By Maris Munkevics Leave a Comment Filed Under: Evolution

human baby girl playing with a monkey

If evolution is true and we really did evolve from monkeys, why the hell are they still here? Similar questions have been among the most common ones asked of biologists for decades. If you ask Google, you will find millions of responses, yet people still seem to demand new and clearer answers. The question gets repeated in different forms: Why are there still chimps (or gorillas, or apes) if we evolved from them?

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