Artículos sobre Natural selection

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For millennia, theologians taught that the sole purpose of sex was reproductive. Now, almost everyone agrees that sex has many purposes – and benefits. Dean Drobot/Shutterstock.com

What is sex really for?

The purpose of sex may seem obvious, but it has perplexed and intrigued a variety of great minds for millennia.
Darwin wondered: what if species change over time in response to their environment? Shutterstock

Curious Kids: how do scientists know evolution is real?

In science, we look at the evidence and try to find the theory that best explains it. And that's what happened when it came to figuring out evolution.
Evolution has no final endpoint in mind. Uncle Leo/Shutterstock.com

Evolution doesn’t proceed in a straight line – so why draw it that way?

If you go by editorial cartoons and T-shirts, you might have the impression that evolution proceeds as an orderly march toward a preordained finish line. But that's not right at all.
A stick insect in Borneo: variation and natural selection has resulted in insects with the astonishing ability to mimic features in their natural environment. Shutterstock

Guide to the classics: Darwin’s On the Origin of Species

In this age of the pseudo-factual, its more important than ever to acquaint ourselves with the foundations of the scientific tradition, such as Darwin's Origin of Species.
Watching bacteria and viruses duke it out, evolving to outwit each other. UC San Diego

Discovery of a surprise multitasking gene helps explain how new functions and features evolve

A core idea in molecular biology is that one gene codes for one protein. Now biologists have found an example of a gene that yields two forms of a protein – enabling it to evolve new functionality.

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