Human Evolution in Africa
Humans, as we consider ourselves, evolved in Africa. Not entirely, but from early primates to our present state. Many people dispute this fact, despite astounding evidence supporting the theory, for various reasons. Showing all the genetic, paleological, and geological proof, I find it very hard indeed to contradict the evidence. True, humans didn't evolve entirely in Africa. As a matter of fact the first known ancestors of humans where found in North America, in the Utah Valley. These animals where nothing more than a shrew in the shadow of the dinosaurs. However, with the event that killed the dinosaurs, they where finally allowed to reproduce and spread. At this time, according to isotope dating, the world was averaging 4 times warmer than it now is. As time went on, the small mammal had spread throughout Eurasia. All of Eurasia then was covered in tropical forests. Primates evolved in what is now the Indian Subcontinent. From their placement in India, then still lowland, primates spread throughout the world once more. Some returned to North America, only to be wiped out by rodents already living there. Others spread to Europe and the Middle East. By this time, Africa had just split fro
The once rodent sized primates, lemurs, now only exist in Madagascar, which had separated from Africa in the early Eocene Epoch, and where there were no predators to be found. In most of Africa, however, the primates got larger. They shifted evolutionary gears to start becoming apes and hominids. About 3 million years ago, the Mediterranean Sea dried up. As our ancestors began reproducing and spreading, some of them were forced out of Africa into Europe once more. These, however, were far more successful than their ancestors were. Who we know as the Neanderthals were the descendants of this population that was forced out of Africa. Our own ancestors, however, remained in Africa. m marsupial overrun Gondwanaland. About a million years later it reached the Middle East, and primates moved in. By now the world had cooled enough that the primates in Europe had been decimated to near extinction. They also migrated south, for the Mediterranean Sea was at that time dry lowland. Now almost all of the primates left in the world were in Africa, and the only marsupial that wasn't wiped out was the opossum. Primates and large cats now ruled, with rodents scarce, which meant that the primates had to adapt to keep from becoming lunch. In light of this, natural selection shows only those primates w
Some common words found in the essay are:
Africa Europe, Rift Valley, Mediterranean Sea, India Indian, Eocene Epoch, Africa Humans, Forest Refuge, Utah Valley, Middle East, Indian Subcontinent, gorilla gorilla, gorilla gorilla gorilla, middle east, genetic paleological geological, evolved 2 species, indeed contradict, north america, proto-chimps proto-gorillas, contradict evidence, hard indeed, proof hard, reasons genetic paleological, geological proof, paleological geological, apes evolved 2,
Approximate Word count = 881
Approximate Pages = 4 (250 words per page double spaced)
|