A new study now finds that there are just two African elephant species, forest and savanna elephants - and they dont interbreed.”The researchers suggest that future work should explore whether the introduction of new genetic lineages into elephant populations - both living and ancient - played an important role in their evolution, allowing them to adapt to new habitats and fluctuating climates.For example, a DNA analysis of the ancient straight-tusked elephant showed that it was a hybrid with portions of its genetic makeup stemming from an ancient African elephant, the woolly mammoth, an present-day forest elephants.”She further added, “It will be China Shower Chairs Manufacturers a reference point for understanding how diverse elephants are related to each other and it will be a model for how similar studies can be done in other species groups..The team painstakingly sequenced 14 genomes, from both living and extinct species from Asia and Africa, two American mastodons, a 120,000-year-old straight-tusked elephant, and a Columbian mammoth.The study, published in the journal Proceedings of the National Academy of Science, was conducted by a team of scientists from McMaster University, the Broad Institute of MIT and Harvard, Harvard Medical School, Uppsala University,and the University of Potsdam.This paper, the product of a grand initiative we started more than a decade ago, is far more than just the formal report of the elephant genome, said co-senior author Kerstin Lindblad-Toh, a senior associate member of the Broad Institute and Director of the Science for Life Laboratory at Uppsala University in Sweden.

However, this has virtually stopped.Researchers also found further evidence of interbreeding among the Columbian mammoths (which covered the present day United States as far south as Nicaragua and Honduras) and woolly mammoths, which arose in Eurasia.”He added that the combined analysis of genome-wide data from all these ancient elephants and mastodons has raised the curtain on elephant population history, revealing complexity that scientists were not aware of earlier. DeGroote Institute for Infectious Research said, “Interbreeding may help explain why mammoths were so successful over such diverse environments and for such a long time, importantly this genomic data also tells us that biology is messy and that evolution doesnt happen in an organized, linear fashion.The research adds to growing fears regarding the future of the few species that remain on Earth.The finding is surprising because interbreeding among closely related mammals is fairly common.Speaking about it, evolutionary geneticist Hendrik Poiner, who is one of the senior authors on the paper and Director of the McMaster Ancient DNA Centre and principal investigator at the Michael G.What the study revealed was that interbreeding was widespread in the history of these animals.Surprisingly, scientists found no genetic evidence of interbreeding among two of the worlds three remaining species, the forest and savanna elephants, suggesting they have lived in near-complete isolation for the past 500,000 years, despite living in neighboring habitats.

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"I wont be one of those people."And with no mention of newly-crowned 100m champion Gatlin, Bolt signed off with a word on athletes who abuse drugs in sports and what the message to children should be. Thats a good legacy to leave.". It has been a surprising championships with lots of shocks. Ive shown that you can do it without doping so thats what I hope the young athletes will take from it."Continue trying in anything you do, its a good message to the kids," he said."No! Ive seen too many people return and come back to sport and shame themselves," he said with a wry smile."When asked what his legacy would be, Bolt spun a line that will be music to the ears of Coe and all at the IAAF, his potential new employers as both parties seek a mutually satisfying position to incorporate the Bolt brand for the advancement of track and field."It is just the championships, not to do with me personally. All I know is track."I always tried my best 100 percent all the time and put on a good show."I am looking forward to being free."Often compared to American boxing great Muhammad Ali by IAAF president Sebastian Coe for not only his sporting prowess but also the charisma and larger-than-life personality he brought off-track, Bolt made the same link in a final press conference Sunday.Bolt insisted that there would be no comeback.

I am always going to leave everything on the track."Ive proven myself year in, year out," said the Jamaican, world record holder in the 100 and 200m, winner of eight Olympic golds and 14 world medals since making his debut in Helsinki in 2005 when he finished eighth and last in the 200m final."The sport is now on the way back up Shower chairs and we have to do everything to keep it in a good light."I have always been strong on doping," he said.Bolt brought down the curtain on his glittering career in dramatic fashion when he pulled up with a hamstring cramp halfway through his anchor leg in the 4x100m relay."I remember after losing the 100m, someone said to me: Usain, dont worry, Muhammad Ali lost his last fight also so dont be stressed about it." Turning to his disappointing 100m outing, Bolt said: "The whole champs has seen bad luck for certain athletes. "Ive said it, athletes should get life bans if you go out of your way to cheat an athlete."If you do that, you can be the best you can be."Im sad to be walking away now.

"My whole life has been track and field since I was 10. "Work hard, stay strong and push on."Its been a rough couple of days," admitted the 30-year-old. Everything happens for a reason; I dont know why it happened but it has.London: Jamaican Usain Bolt said Sunday he was sad but also excited to bow out of athletics, adding that his disappointing world campaign in London would not change his career achievements."I dont think one championships is going to change what Ive done in this sport. Its exciting, Im happy.That meant his final competitive race finished without a medal, Bolt having sealed a bronze in the individual 100m behind American duo Justin Gatlin, who has served two doping bans, and Christian Coleman. I need fun and to relax a little bit.

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