Evolution is a tale of life

A cockroach cannot defeat a dinosaur. But the cockroach is better at one thing – adaptation, which has ensured its survival through the ages. There are more than 8 million animal species on the planet ranging from single celled primitive organisms such as bacteria to highly complex and intelligent human beings.

But where did these animals come from? Just like an artist takes his time to create his masterpiece, nature also took its time creating the diversity we see today: 3.5 billion years of evolution!

evidences of evolution tale of life

Charles Darwin on 24 November 1859, published his theory of evolution in his paper “On the Origin of Species”. He stated that population of organisms evolve over the course of passing generations through natural selection.

I’ve seen people asking questions like “If humans have evolved from apes, why do these apes still exist?” or “Why did not all the apes evolve into humans?” It is one of the major misconceptions about evolution. Apes do not evolve into humans. And no humans were evolved from apes! We have evolved differently sharing a common ancestor. Evolution is not a chain or a one-way cycle (as you've seen in the picture below)

evidences of evolution tale of life

Evolution is like a tree. Human beings, chimpanzees, orangutans and gorillas are the branches of a tree whose root is a common ancestor. Evolution takes place when random mutations occur in an organism and if those mutations are good enough to help the organism survive its environment, those genes are passed on. On the other hand, if the mutations are not helpful and the organism is not well suited to the environment, it goes extinct.

This is what Natural Selection is! Charles Darwin once said, It is not the strongest who survives, nor the most intelligent, but the one that is most responsive to change! But how do we know that evolution is real? Well, there are many observations that can count as proofs for evolution – best one being the similarity between organisms:

evidences of evolution tale of life

Also, do you know that we share some percentage of DNA with every organism alive on this planet – This gives the idea that we all are somehow related and have a common origin. To look at yourself and think that you’re the art of nature crafted through a course of 3.5 billion years of evolution of life on earth is truly astounding!

evidences of evolution tale of life
This post was written by Shashwat Goswami, a biochemistry student from Ahmedabad, India.


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