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At least they had stone tools with polish. At least they are as resistant to tropical diseases as the Austronesians, because they carry the same five types of genetic defense mechanisms against malaria as the Austronesians, and some or all…

So many germs have to come up with lots of tricks to spread among those who might fall victim to it, and many of them are what we perceive as "symptoms of disease." Cats She Lived Happily Ever After poster. We have created our own tricks to…

Our slowest defense response is through natural selection, which changes our genotype frequency from generation to generation. For most illnesses, some people tend to be more resistant to genetics than others. Don’t tell me what to do cat…

Another common way we respond is to mobilize the immune system. Dog And She Lived Happily Ever After poster. Our white blood cells and other cells actively detect and kill foreign germs. The specific antibodies that we gradually build to…

But for hard work, "hands and feet", the champion must give to species like hookworms and schistosomiasis, the larvae of this species follow the faeces of the host out and live in the water or underground for a while, then dig through the…

Without a doubt, if some of the wild mammals of those continents could be tamed, some Australians, Americans and Africans would have domesticated them and reaped many advantages from they, like them, have benefited from Eurasian cattle that…

Even though they did not absorb crops, the Khoisans who had acquired cows and sheep about 2,000 years ago had occupied the Khoisan hunter-gatherers in most of southern Africa. Dog And she lived happily ever after poster. The introduction of…

The third advantage of the Mediterranean crescent climate is that it has many different heights and terrains within a short distance. Thanks to a variety of elevations, from the lowest point on the Dead Sea to the 18,000-foot mountains near…

As a result, it has the highest diversity of plants and wildlife, higher than relatively small Mediterranean climates such as southwestern Australia and Chile. Second, among the climatic regions of the Mediterranean, western Eurasia has the…

This cross pollination occurs not only among individuals of the same species but also among species that are related to each other to produce hybrid species between species. Such a hybrid among the semi-hermaphrodite plants of the Crescent…