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Why do we have blood-types?

I was a school student when I had chanced upon a National Geographic article called Cell Wars; it talked about how our immune system works – who are the attackers, who are the defenders, and how does our biological weapons factory manufacture antibodies. As it is with a lot of National Geographic articles, this one was brilliantly illustrated. Well recently, I chanced upon another interesting article on immunology – the history of blood types. There are interesting things in this article such as busting the blood-type diet and discovering the good-diet plan; the Bombay phenotype (no A, B, O, or AB blood type!); and more.

Many decades ago, we found that blood transfusions in humans are not always successful because of differing blood types (A, B, O, and AB). However, even after decades, we are not sure why do humans, though a single species, have different blood types.

http://mosaicscience.com/story/why-do-we-have-blood-types

(The one above is lengthy)

The bloody killer

I can’t watch horror movies especially the ones in which the end is unresolved and the ghost, the evil, or the zombie survives. Because that can disturb me long after the movie is over. But, in spite of everything that I said, horror movies are works of fiction. What about a real horror story?

This article is about Ebola virus and the horror it causes. It tells us how a miniscule organism can deteriorate a human body so rapidly and so gruesomely. It is also about what is not so dangerous about it and how to mitigate the risk of an epidemic. Finally, the other killers kill more than Ebola does. So, in reality, we are really horrified by our brains making the risk seem too big in our heads.

http://www.randomhouse.ca/hazlitt/feature/natures-most-perfect-killing-machine

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