Evolution of Humans: Developed world and Developing world

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Recently a British genetics expert, Steve Jones stated that humans in developed world have stopped evolving, because people there in western countries need not struggle for there survival and the famous theory of Darvin “survival for the fittest” doesn’t come into picture. And he didn’t miss saying that the evolution hasn’t stopped in the developing world, because people there have to struggle for survival.

 

I am no expert in the evolution theory of genetics, nor have I studied biology beyond matriculation, nor I want to challenge the British expert because I am not qualified enough, but I cant suppress something in me which tend to disagree.

 

This seems to be a loose statement and I differ and would like to raise some points

 

He says that humans in developing countries stopped evolving because they need to struggle for survival. Well, I feel this is a very sweeping statement, as not all people in developing countries struggle to survive, many of the people live as lavish life as people in developed countries. So does that mean that in developing countries too some people have stopped evolving? Evolution takes a vast time frame, even for a minor change thousands of years pass. And I don’t think it takes anything more than a century for backward countries to develop, so as per the theory of Mr Steve, nowadays peole of developing countries are subject to evolution and after hundred years they will again stop evolving? It seems Mr Steve has assumed that all backward countries will remain backward in next thousand years.

Or can anyone say it for sure that all people in developed countries need not struggle for survival.

 

Even if I view it from another point of view, and forget about developed and backward countries as mentioned by Mr Steve, can it be assumed that anyone irrespective of country he lives in, if lives in extreme poverty, then his further generations would also live in extreme poverty so that evolution could take place?

I think evolution theory is not same for humans and animals, as animals can not change their life at their will, they will live in jungle, struggle for survival and in the process, will evolve. But in case of humans, as they have got the ability of change their life due to highly developed mind, their process of evolution should be different. Suppose someone lives in extreme poverty and need to struggle for survival, so is his next generation, so next to next generation, but it’s not guaranteed that his 100 generations will live for sure in extreme conditions for evolution to come into picture. In fact it’s very likey that his next generations live in much better conditions.  

 

One more fault (at least I think so) in Mr Steve’s theory is that he has assumed that if conditions so come, people in developed world will not evolve, and also there wont be any crisis which would call for further evolution of humans.

 

Evolution takes place in a very vast time frame, but nature has made it sure that even in a very short time frame further generations of living beings may be born with somewhat better profile, by making two sexes in almost all of living beings.

All the species happen to have a tendency to extend their population and two sexes can help the newborn inheriting better of two. This is a natural refinement process of the living beings, but unfortunately we humans waste it because in our civilization marriage is supposed to happen only between equals.

 

Are Birds close to Reptiles

 

 

 

 

 

 

 

 

 

 

 

 

Few days back I watched a show on discovery channel which tried to establish a link between dinosaurs and birds, it said that possibly birds evolved from dinosaurs. It showcased many reasons for the same. Mainly the similarity between the skeletons of the birds and dinosaurs was too convincing, such similarity to the dinosaurs is not scene in any other living creature on earth.Also dinosaurs are believed to have respiratory systems similar to modern birds.

  

 As the dinosaurs are said to be reptiles ( As they had no fur, laid eggs, their skin had scales, and many of their species were cold blodded )  after watching that show, I started wondering whether birds are close to reptiles, though birds are not technically reptiles as they are warm blooded as opposed to reptiles which are cold blooded. But there are many similarities, which are following

  • Birds and reptiles both lay eggs
  • Birds and reptiles show some skeletal similarities
  • Birds have feathers, which are said to be modified scales
  • Birds feet have scales 

Even whether dinosaurs were reptiles, is too debatable, as it’s still not sure whether they were warm blooded or cold blooded. Till the mid 20th century it was believed that dinosaurs were cold blooded, slow moving creatures, but later research has found that they were very active animals and could have been warm blooded. This issue is still debatable.  Also one dissimilarity between dinosaurs and reptiles is that the legs of dinosaurs were directly below their hips, like in mammals and unlike in lizards.

 

So, the conclusion of the above is that there are similarities between both birds and reptiles and dinosaurs and reptiles, so scientists established a theory that both birds and reptiles had a common ancestor in dinosaurs. But there are many who even believe that birds are not evolved from dinosaurs but birds are dinosaurs.

 

Many may think that why I’m discussing such a topic, or how does it matter if birds are close to reptiles. But it matters to me because I used to like birds and used to not like reptiles. In fact I hate reptiles, I become restless if I spot a lizard on the walls and cant live in such a place. So, now after watching that show on discovery and analyzing similarities between birds and reptiles, I didn’t really enjoy this fact.

 

Shark vs Crocodile

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The western media wants everyone to believe that sharks are the most dangerous species of the water or even otherwise. We have scene lots of Hollywood movies based on shark scare like the “Jaws” series (third movie of Jaw series was one of the worst movies I ever saw) or the later “Deep blue Sea” (which was made very scary indeed) or “red water” (which I haven’t scene yet) etc. Even the discovery channel shows lots of shows about sharks. Perhaps the western culture believes or wants to believe that sharks are most dangerous animal on the planet. 

 

But the study and statistics say that sharks are not that dangerous, sharks tend to avoid humans and very rarely attack, that too when she is convinced that the target is another fish or water creature. Wikipedia says that during 2001 to 2006, average fatality per year due to shark attack is just 4.3 as compared to hundreds of fatalities every year by crocodiles. All the species of sharks including great white, have been filmed in water without cage protection, can one dare to do so with a salt-water crocodile? 🙂

 

On the other hand crocodiles, particularly salt water crocodiles are the most dangerous water species for humans because they target humans intentionally, and humans are always on their menu 🙂 . Crocodiles kill annually hundreds of humans with intentional attacks without any provocation. Also the strength of a crocodile is unbelievable, it can drag a full-grown buffalo into water very easily. A salt water crocodile can grow up to 7 meters and there have been reports of crocodiles 10 m long too. And any species of shark doesn’t stand anywhere if compared with a crocodile.

 

Wikipedia says

 

“Despite their slow appearance, crocodiles are top predators in their environment, and various species have been observed attacking and killing sharks

 

Wiki further says

 

“The larger species of crocodiles are very dangerous to humans. The main danger that crocodiles pose is not their ability to run after a person but their ability to strike before the person can react. The Saltwater and Nile Crocodiles are the most dangerous, killing hundreds of people each year in parts of south-east Asia and Africa. Mugger crocodiles and possibly the endangered Black Caiman, are also very dangerous to humans.

  

Then why western culture is so obsessed with sharks? Probably because of their appearance, with round bulging eyes and big jaws, sharks look really scary, whereas crocodiles don’t look so scary if compared to sharks.

 

In Indian culture, crocodiles have always been considered most dangerous water species, bollywood films have also reflected it at times, and also there is a saying in Hindi “Jal mein reh kar magar se bair”.

  

Following is an interesting slide show of a fight between shark and crocodile, and of course crocodile was the winner.

 http://www.youtube.com/watch?v=6OfOvs79wDc

   

 

 Note– Image is from Youtube