Video ice age one strange herd
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Or he could have been facing a drought or a harsh winter, forcing him to seek a new area where food was more plentiful. Scientists say the male may have been solitary, and moving from herd to herd to reproduce. The mammoth has "three or four times in its life, made an immense journey of 500, 600 even 700 kilometres, in a few months." "What was really surprising was that after the teenage years, the isotopic variations start to be much more important," said Bataille. But his movements also changed greatly depending on his age, before he eventually died of hunger.ĭuring the first two years of his life, researchers were even able to observe signs of breastfeeding. The animal returned regularly to some areas, where it could stay for several years. Isotope ratios are different depending on geology, and Bataille developed an isotopic map of the region.īy comparing it with the data from the tusks, it was possible to track when and where the mammoth had been.Īt the time, glaciers covered all of the Brooks Range of mountains in the north and the Alaska Range in the south, with the plain of the Yukon River in the center. The tusks grow throughout a mammal's life, with the tip reflecting the first years of life, and the base representing the final years. It is transmitted to vegetation and, when eaten, is deposited in bones, teeth. Strontium is a chemical element similar to limestone and is present in the soil. One of the two tusks was cut in half to take readings of strontium isotope ratios. The animal, named "Kik" after a local river, lived relatively close to the time of the extinction of the species, around 13,000 years ago.
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"It was really a surprise."įor their study, the researchers selected the tusks of a male woolly mammoth who lived at the end of the last ice age. "We see that it traveled throughout Alaska, so an immense territory," said Bataille. The researchers were amazed by the results: the mammoth they studied probably walked around 70,000 kilometres (43,500 miles) and did not stay just on the plains of Alaska as they expected. But there is no clear reason why mammoths should have trekked great distances "because it is such an enormous animal that moving around uses a lot of energy," he said.