Nature

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Scientists have collected the most detailed recordings of narwhals to date, displaying a charming range of click, squeak, and buzz vocalisations that will help researchers understand these ‘sea unicorns’ like never before.   This information could help scientists predict how the East Greenland narwhals might be affected by an increase in human-made sounds in their
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Welcome to the age of the urban rat. There are about 2 million New York City rats, a 2014 estimate suggested, which would mean the rodents in New York outnumber the humans in Philadelphia. Do not discount the power of gnawing teeth in aggregate — Cornell University scientists once calculated rats cause $19 billion in damage annually.   Rats and