Can science prove the age of the earth? No scientific method can prove the age of the earth and the universe, and that includes the ones we have listed here. Further, it has to be assumed that the clock was never disturbed. There is no independent natural clock against which those assumptions can be tested. For example, the amount of cratering on the moon, based on currently observed cratering rates, would suggest that the moon is quite old. However, to draw this conclusion we have to assume that the rate of cratering has been the same in the past as it is now. And there are now good reasons for thinking that it might have been quite intense in the past, in which case the craters do not indicate an old age at all see below. No scientific method can prove the age of the earth or the universe, and that includes the ones we have listed here. Ages of millions of years are all calculated by assuming the rates of change of processes in the past were the same as we observe today—called the principle of uniformitarianism. If the age calculated from such assumptions disagrees with what they think the age should be, they conclude that their assumptions did not apply in this case, and adjust them accordingly.
Study suggests humans are slowly but surely losing intellectual and emotional abilities
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Good symmetry shows that an individual has the genetic goods to survive development, is healthy, and is a good and fertile choice for mating. The rules of attraction, it turns out, seem.
Before the scientific era, people often made up imaginative stories to explain what they saw in the world. The scientific method changed that by requiring rigorous experimentation to test hypotheses and determine what is real. With the Theory of Evolution, people are back to making up imaginative stories. The primary advantage of complete metamorphosis is eliminating competition between the young and old. Larval insects and adult insects occupy very different ecological niches. Whereas caterpillars are busy gorging themselves on leaves, completely disinterested in reproduction, butterflies are flitting from flower to flower in search of nectar and mates.
Because larvas and adults do not compete with one another for space or resources, more of each can coexist relative to species in which the young and old live in the same places and eat the same things. Ultimately, the impetus for many of life’s astounding transformations also explains insect metamorphosis: Nevertheless, “biologists have established a plausible narrative about the origin of insect metamorphosis, which they continue to revise as new information surfaces.
In response to this unfavorable situation, some pro-nymphs gained a new talent:
Athlone McGinnis Athlone is a young man whose background gives him unique insight on sociological and cultural changes that are happening today. Having already discussed the means through which black males can increase their chances of dating non-black women , I thought I would also touch on the subject of white males approaching non-white women. Interest in black female and white male pairings does exist in the US.
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He was married for 10 years and has been divorced for about 2. His ex still gives him a hard time, but he says that he has moved on. He has custody of one child and she the other. We spend majority of our time together. He said that he expected me to pull back, but not cut it off completely. Then, he back peddled and said he prays daily for god to release some of the things in his life.
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If evolution is a scientific theory worth its salt, then there must be some conceivable observations that could show it to be wrong. I just wanted to put down, for the record, what some of those observations might be. Evolution occurs, that is, there is gene frequency change in populations over generations. Significant evolution takes time—that is, it usually though not always requires hundreds to thousands of generations to occur.
It is not instantaneous, and it is the population and species rather than the individual that evolves. Lineages of organisms split, or speciate, so that the single lineage that gave rise to life 3. The converse of 3: That is, if you trace any pair of twigs on the tree of life, you will find a node where the line from the trunk bifurcates to produce them. The process producing the appearance of design in organisms is blind, purposeless natural selection.
For example, you could have evolution without branching: Or you could have evolution, but not occurring by natural selection. The complete absence of natural selection is hard to imagine, though, given that organisms replicate their genetic material, and some genes will replicate better than others in different environments.
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Estimated recombination parameters r breakpoints per centimorgan and time since admixture [years before present YBP ] Replicated Analysis with a Different Dataset and Method. To substantiate these results and gain additional insights, we also analyzed a different genome-wide dataset 11 consisting of about , SNPs analyzed in 36 individuals from seven populations from Indonesia including two populations from the Moluccas, four populations from the Nusa Tenggaras, and one population from Borneo and 25 individuals from the highlands of Papua New Guinea Methods and Table 2.
In agreement with the Pan-Asia data analysis, principle component analysis PCA for these data shows a cline in the genetic ancestry of East Indonesian populations between Borneo and New Guinea, with Asian ancestry gradually decreasing from west to east across Indonesia Fig. Interestingly, we observe that PC2 is largely driven by differences between the two Moluccas groups who speak Papuan languages and the other groups who speak Austronesian languages.
Next, we estimated ancestry components in each population using the maximum likelihood-based algorithm implemented in the program frappe This notion is also supported by the next analysis, where we compared the admixture rates on the autosomes and the X chromosome in these groups. In agreement with previous studies 7 , we observe a higher frequency of Asian ancestry on the X chromosome relative to the genome-wide estimates, which suggests that the admixture in Eastern Indonesia was sex-biased, with greater contribution from Asian women.
However, this sex-biased pattern of admixture is only seen in the Nusa Tenggaras and not in the Moluccas Fig. Because our samples from the Moluccas come from Papuan-speaking groups, whereas the Nusa Tenggara samples are from Austronesian-speaking groups, this result suggests that sex-related differences in the admixture between Papuan and Austronesian groups are consistent with the hypothesis that the Austronesian groups were matrilocal 19 , We, therefore, estimated the time of Austronesian—Papuan admixture separately for the Nusa Tenggaras and the Moluccas using the wavelet transform method described previously Implications for Austronesian Expansion.
Two important points arise from the admixture time analysis. First, both datasets indicate a cline of decreasing time of admixture across East Indonesia, with oldest time in the west and youngest time in the east. These results strongly suggest that the admixture cline in East Indonesia reflects the spread of individuals of Asian ancestry coming from the west and admixing with resident groups of Papuan ancestry.
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