They do not lay eggs, but instead give birth to large young. Researchers have long theorized that clones, by not purging harmful mutations, should experience deterioration in the genome and consequently lead to extinction over the generations. They have discovered that the Amazon molly is the result of a sexual reproduction event that involved two different species of fish between 100,000 and 200,000 years ago, the Atlantic molly and the Sailfin molly. Since then, the resulting Amazon molly has been a hybrid species that has been evolutionarily frozen in a remarkable way, and continues to thrive even now. “The Amazonian molly has few harmful mutations, low levels of genetic breakdown and a unique and constantly evolving variability,

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especially the genes related to the immune system”, explains South Africa WhatsApp Number List Raquel García Pérez. “These characteristics could explain the evolutionary success of the species.” The researcher Cecilia García Campos has led a study by the Dental Anthropology Group of the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH) which has just been published in American Journal of Physical Anthropology, on a new methodology of forensic identification developed to establish the sex of deceased persons with a reliability of 92%, by applying micro-computed tomography (microCT). Thanks to this microCT technique, widely used in the field of paleoanthropology, the Dental Anthropology Group has been able to study the internal structure of a broad forensic

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dentistry sample from the School of Legal Medicine in Madrid, as well as from different South African and Sudanese institutions, and thus to identify differences in the dental tissues (enamel and dentine) of the canines belonging to present-day men and women. “We’ve applied a technique we were already using with the fossil remains of Atapuerca to explore the internal structures of the canines of more than 60 men and women, to look for characteristic features which would help to determine their sex, and the results have given us a reliability of close to 100%”, comments García Campos. With this X-ray technique, it is possible to obtain very high-resolution three-dimensional reconstructions of the external and internal structures of bone remains, which over

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