Monday, July 23, 2012

Evidence the Human Race Nearly Went Extinct

And here’s the payoff: Junior and his 46 chromosomes would likely have an easier time having children than his 47-chromosomed parents. Remember that the fusion itself doesn’t ruin you—lots of healthy people have fusions. It’s only reproduction that gets tricky, since fusions can lead to an excess or deficit of DNA in embryos. But because he has an even number of chromosomes, little Junior wouldn’t have any unbalanced sperm cells: Each would have the right amount of DNA to run a human, just packaged differently. As a result, all of his children have a good chance of being healthy. And if his children start having their own children—especially with other relatives with 46 or 47 chromosomes—the fusion could start to spread.
Scientists know this scenario isn’t just hypothetical. In 2010, a doctor in rural China discovered a family with a history of consanguineous (“similar blood”) marriages. Among the various overlapping branches of the family tree, he discovered a male with 44 chromosomes. In this family’s case, chromosome 14 and chromosome 15 had fused, and, consistent with the outline above, they had a brutal record of miscarriages in their past. But from that wreckage a perfectly healthy man with two fewer chromosomes emerged—exactly like that unknown Guy who started down the path to 46 chromosomes a million years ago.
But that solves only part of the mystery: How did having 46 chromosomes then spread worldwide? It’s possible that having two fewer chromosomes than everyone else gave Guy and Doll’s family a whopping evolutionary advantage, allowing them to out-compete the 48-chromosome sluggards. But probably not. More likely, they happened to be living at a point when the human race nearly got wiped out.
Take your pick for the cause of our near-extinction—ice ages, plagues, Indonesian gigavolcanoes. But humans have far less genetic diversity than most other species, and the most reasonable explanation for this is a genetic bottleneck: a severe reduction in the population of humans in the past, perhaps multiple times. One study suggested that our population, worldwide, might have dropped as low as 40 adults. (The world record for fitting people in a phone booth is 25.) That’s an outlandishly pessimistic guess even among disaster scientists, but it’s common to find estimates of a few thousand adults, below what some minor league baseball teams draw. Consider that these humans might not have been united in one place, but scattered into small, isolated pockets around Africa, and things look even shakier for our future. Had the Endangered Species Act existed way back when, human beings might have been the equivalent of pandas and condors.
But however alarming, bottlenecks and near-extinctions aren’t necessarily all bad. With less competition around, a beneficial brain-boosting gene, say, could have an easier time spreading. And those who slip through the bottleneck become big Darwinian winners, because whatever genes those dumb-lucky survivors have can spread far and wide. Guy and Doll were likely two of those survivors, and they bequeathed to the rest of us our unique arrangement of 46 chromosomes.
end quote from:
The Chromosomal Evidence That Mankind Nearly Went Extinct

I suppose another reason for not very much genetic diversity could also be that humans are a humanoid Ape hybrid of survivors from another planet that made their way here. For example, some survivors might have made it here from the planet blown up by thermonuclear explosions which was proved by the Soviets in the 1970s which became the Asteroid Belt. Or, they could have come from Mars which which lost most of it's atmosphere when the Asteroid Belt Planet (Sometimes called Maldek) was blown up in a war(possibly between Mars and Maldek). (Guess who won?) However, both lost their planets(Maldek blew up and Mars lost it's atmosphere) and any survivors likely had to come here to earth. And since earth was different than those two planets likely humanoids had to breed with resident apes through genetic engineering to survive the gravity and microbes and bacteria here on earth. So, the human hybrid has a shorter lifespan than the original humanoids we spring from. 

If you read the above article carefully, maybe it was 40 adult humanoids from another planet were all that survived that war and who came to earth to start again.  Maybe one space lifeboat full of the wives and children of world leaders of one or both planets and possibly among them one or more genetic engineers to create us.

Note: I wrote the following about 2 years ago when my best friend from High School passed away and I attended his funeral. So, the background information on UFO's and how they relate to us that is later on in this blog will be self evident as you read this:

Mike Believed in UFOs

No comments: