A research team from the University of Wisconsin-Madison have studied levels of dung fungus in an attempt to work out exactly when the population of woolly mammoths started to decline. The research found that mammoths started to die out about 15,000 years ago – well before the development of sophisticated spears.Jaqueline Gill, who headed the research team, says the research also rules out the theory that an asteroid could have wiped out the animals.
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