Previous studies have shown that polar bears with high levels of pollutants called organohalogens have smaller testicles and penis bones, said Christian Sonne, of Aarhus University in Denmark.In extreme cases it can have an impact on the density of the penile bone – also known as baculum – which could prevent successful mating.
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argue that a population of polar bears got trapped on the ABC islands of SE Alaska towards the end of the Last Glacial Maximum (LGM: 26,000-11,500 calendar years ago or 24,000-13,000 radiocarbon years before present, RCYBP) and then hybridized with male brown bears that swam to the islands from mainland Alaska, “” (see the press release here). * marks location of On Your Knees Cave, on Prince of Wales Island, where many pre- and post-LGM brown bear bones were found. Proceedings of the 15th International Congress of Speleology 1(1): I-N.
Their conclusion is based on known similarities in the mitochondrial DNA (mt DNA) between ABC brown bears and polar bears plus their finding that 6.5% of the genetic material on the X chromosome of ABC brown bears (which is nuclear DNA) is like polar bears, indicating that genetic material likely came from female polar bears. Upper: The region under discussion here includes Southeast Alaska and northern British Columbia. Map showing SE Alaska (light green) and the north end of coastal British Columbia (dark green), courtesy T. Admiralty, Baranof, and Chichagof Islands (the ABC Islands) are just to the north.
But when the supernatural villain Kai begins to sweep across China defeating all the kung fu masters, Po must do the impossible—learn to train a village full of his fun-loving, clumsy brethren to become the ultimate band of Kung Fu Pandas!