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Top2Toe

This page is the start to the Top2Toe series in which the human body is analysed in detail to discover all that evolution makes us be.

A starter the evolution of the human body and by-products of evolution.

IT'S HERE! :)
The first post in my series, Why do fingers and toes wrinkle in water?


next, From toes to feet (The path our humble feet have walked...)
         Did our feet and hands evolve together?

Popular posts from this blog

By-products of Evolution - why not everything has a purpose

Last time we looked at how certain major adaptations such as hair loss have enabled humans to survive over the millennia in different conditions, and when faced with competition from other species. Not everything about the human body has a specific purpose, though, in the sense that we expect it to. One example of such thing is the philtrum - that little channel leading from the base of your nose to the upper lip. Recent research suggests that this development dates back millions of years, and has been inherited from fish. Apparently, when human embryos develop their face in the womb, all parts of the forehead, mouth, etc come together and fuse where the philtrum is located.


Some adaptations, on the other hand, are no longer relevant not because of their nature, but because the environmental selection pressure for which they evolved has disappeared. For example, an East Asian's typical eyelid shape evolved as a result of higher light intensities in that area of the world, yet the …

The evolution of the human body

In order to be able to look at ourselves in the mirror and be able to answer the question "Why do I look like this?", we must look back to our ancestry and their lifestyle, over a very long period of time. For the purpose of this analysis, let's look at the human versus the neanderthal. Recently there have been found neanderthal genes within the human gene pool, but the two species are different enough to compare, yet not too different (human versus fly would be too different).

As you can see, the construction of the human pelvis and toes is different, and the human has less hair. This results in humans being able to run easily for long distances, in the detriment of short-distance running which we are worse at. We sweat better, so we can do more long-term effort. This feat is essential to better settlements, as we can discover a larger area with potentially better resources. It might seem counterproductive to not be able to run quickly for a short period, when it comes …

Positive, Negative and Neutral Sexual Selection

Positive sexual selection is the most important and obvious type. It is positive because it involves the promotion and support of a characteristic, be it good looks or ambition, sense of humour or colour. Positive sexual selection is the driving force that results in variety of organisms, as well as the variety of what those organisms make, for example chocolate corn flakes or oats and fruit. This type of sexual selection is found in so many things, a popular example of which is teenage behaviour when teenagers feel the urge to pick things to support, be it a music genre, a sexual orientation, a fashion, a sport, or a club. Positive sexual selection is what fan clubs are made of.

Know when you see something on facebook and you MUST LIKE it? You absolutely must click like? The drive behind that urge is positive sexual selection. You like that and everyone must know. Not because you want them to like you, but because you want them to like that thing. This urge might seem superficial, bu…