World Health Organisation estimates worldwide there are one billion cases of influenza annually. We catch the flu, recover from it, but we are not off the hook, we can catch the flu again.
Mutation in Our Daily Lives
After the flu virus infects the human body, it multiplies itself, spreads to other humans to infect their bodies. During creating copies of itself, minor changes may occur in the virus’s DNA, in other words, it mutates. These minor mutations add up in time and a new strain of flu is born that is ready to infect even those recovered flu patients.
Under normal conditions, the flu virus impacts a species or a group of species. For instance, human flu doesn’t affect our dogs, but our cousins, chimpanzees are prone to it. However sometimes one of the strains of a virus mutates in such a way that the virus spreads to humans too. Such as what has happened with the swine flu, and bird flu viruses.
Natural Selection in Our Daily Lives
In one of the episodes of the Canadian TV show “Just for Laughs Gags” the prankers throw a toy snake onto the windscreens of the parked cars with drivers sitting in them. Regardless of their age, size gender, most, if not all, prank victims jump with fear and scream. None of them have probably seen a snake before if not in a zoo, and all of them surely know the snake cannot go through the windscreen.
A natural scare towards snakes is hardcoded in many of us because in our natural habitat, in Sub-Saharan Africa, being able to spot the snake fast and keeping away from them what humans had to do to survive. People were more likely to die before having children if they weren’t afraid of scares. Because we are the children of generations who were selected by this natural process, even conversing about snakes makes us feel uneasy.
Sexual Selection in Our Daily Lives
In the US alone, the amount of money spent on cosmetic surgeries annually dwarfs dozens of countries’ annual GDP. Why do we want to look young and fit, why do we find an athletic body sexy but a body with excessive not so much?
Literature says it is less about the physical characteristics but more about the income of an individual that directly corotates with the number they have. This was not always so.
There was a time our ancestors mated with their instincts. What made a sexual partner desirable was their physical characteristics that promote the chances to survive and reproduce. Our ancestors who chose young and fit partners were more likely to pass on their genes to the next generation.
Our female ancestors impregnated by the strong youthful reigning male ancestors, who could provide better protection and enough food for the mothers, were more likely to have at least one child that survived to have its own children. Likewise, our strong youthful reigning male ancestors that had multiple young and fit female partners were more likely to pass on their genes.