Originally posted by: Atomic Playboy
Originally posted by: tiejiba
After coming back from my african wild life trip, I feel people (human) is the end of life evolution. From this point, the life on earth is going down.
By far, human has the best gene on earth and it takes millions of years to get this point.
Life started from very simple form and began more and more complex through the natural selection.
When I was in africa I wittness the whole process. In the animals, only the ones (male) that are strongest, toughest can mate and pass on their gene. Overall, the ones with best gene and their offsprings will survive while improving their gene. Eventually, they evolve into a higher level of life form.
Rightnow, human dominates this planet and other speices have no room or time so they can out evolve us and replace human.
At the other end, look at ourselves, everybody can mate and reproduce no matter what kind of gene he has. This means all the gene (good, mediocre, bad) are passed on. The bottomline is we are not improving our genes in long term. We may create technical wonders, but as a life form, our quality is going down.
It's an interesting proposition that we are the best species on Earth. It's a bit hard to be objective about that, don't you think? After all, we're making the list; our egotistical nature will want us to come first. But what warrants us getting that top position? As a species, we're remarkably fragile. If all the nuclear bombs in the world were detonated right now, all humans would die. So would pretty much every mammal, bird, reptile, amphibian, most insects, etc. There would probably be some fish that lived, deep in the ocean, where radioactivity was unlikely to reach. Everyone always says cockroaches would survive (don't know if I believe that one myself, but whatever). Bacteria would survive.
Bacteria are better than us.
In fact, I'd be willing to say that virtually any disaster that could befall the Earth (a giant volcano, a meteor hitting us, etc.) that would wipe out humans would hardly affect bacteria at all. Sure, an inconceivable number of bacteria would die, but not all of them (scientists estimate that there are 5,000,000,000,000,000,000,000,000,000,000 bacteria on Earth). Short of a comet or meteor hitting us that was large enough to actually destroy the planet, I can't conceive of an event that would effectively eradicate all life on Earth. Regardless of what happens to us, bacteria will press on.
Bacteria are better than us.
In fact, our comparative weakness is such that we can even be killed by bacteria. Toxic shock, anthrax, tuberculosis, and other potentially fatal diseases are caused by bacteria. But bacteria aren't all bad; without bacteria in our stomach, we would be unable to digest food, and would surely die of malnutrition. Bacteria are so important to human life, and hold the keys to our mortality.
Bacteria are better than us.
So before you go saying that humans have "the best genes," maybe you should consider what's best? Bacteria are genetically inferior to humans by any objective measure, and yet they are able to endure more than humans could ever dream of. They can live miles beneath the surface of the ocean, where the pressure would crush a human to the size of a soda can. They live in the frozen tundra of the Arctic, where temperatures rarely creep above -30. They live in steam vents at over 3500 F. They can live in acid or base, in an environment of methane and amonia. They were here billions of years before us. They will exist after humans are extinct.
Evolution will not end with us.
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