What would you do if you saw someone hurting an animal? Mos...
Today’s Affirmation: My eternal happiness comes from within.
As impressive as the capabilities and survival history of the global megafauna were, what seems far more difficult to explain away are the humans that arrived when the global megafauna went suddenly extinct. The only megafauna of note to survive were those that had lived with humans in Africa and Eurasia for more than a million years and learned to avoid them, as almost all game animals do today.
NATURAL SELECTION: A DEFINITION
When protohumans mastered and , they eventually transformed , and there is no persuasive reason to believe that an early application of their new ability to inflict wounds would have not been used on each other. As this narrative reaches the rise of and the archeological record’s changing toolsets before people became sedentary, those artifacts may well reflect the conqueror’s toolsets, and the vanished toolsets also represented vanquished and exterminated peoples.
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Some kinds of organisms found great success with their strategies and they marginalized other kinds and even drove them to extinction, to only die off themselves in a mass extinction event, and the previously marginalized life forms flourished in the post-catastrophic biome. The rise of might have never happened without the dinosaurs’ demise. Mass extinction events account for less than five percent of all species extinctions during the , but they had a profound impact on complex life’s history; the rise of mammals is only one of many radical changes. Not only would a class of animals such as mammals thrive when their dinosaur overlords were gone, but the of mammal evolution was also influenced. It took millions of years, even tens of millions of years, for ecosystems to approach their former level of abundance and diversity after a mass extinction event, and the new biomes could appear radically different from the pre-extinction biome. The geologic periods in the eon of complex life usually have mass extinctions marking their boundaries.
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The was the first mass extinction of organisms that could be seen with the naked human eye. There was an soon before the eon of complex life began, and there may have been mass extinctions of microbes before then, but the evidence is so thin for anything before then that scientists may never know just how many mass extinctions there were. However, bacteria and archaea, those , and those communities do not have the apparent instability of complex life’s food chains, so there may have been few mass extinctions in Precambrian times. Cyanobacteria have not fundamentally changed in billions of years, which means that its mode of living has always worked well enough to ensure its survival. No animals have anything close to such a lengthy pedigree.