Vapori di metalli pesanti trovati inaspettatamente nelle comete, in tutto il Sistema Solare e oltre
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Vapori di metalli pesanti nelle comete, nel Sistema solare e oltre
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Vapori di metalli pesanti trovati inaspettatamente nelle comete, in tutto il Sistema Solare e oltre
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(Art by Mauricio Anton)
The iconic and terrifying dire wolf, made famous in the television series âGame of Thrones , prowled through North America until about 11,000 years ago or perhaps more, after which they went extinct. They were once believed to be closely related to living wolves. But research suggests that this is not true. Extinct dire wolves split off from other wolves nearly six million years ago and were only a distant relative of todayâs wolves, according to a new study, which puts to bed a mystery that biologists have pondered for more than 100 years.
The ancestors of the gray wolf and the much smaller coyote evolved in Eurasia and are thought to have moved into North America less than 1.37M years ago, relatively recently in evolutionary time. An international team sequenced the ancient DNA of five dire wolf sub-fossils from Wyoming, Idaho, Ohio and Tennessee, dating back to over 50,000 years ago. The collaboration of 49 researchers across