"Sloths are uniquely vulnerable to rising temperatures due to their physiological adaptations," the study's lead researcher, Dr Rebecca Cliffe, told Newsweek.
"Without being able to consume more food, their metabolic rate can't increase fast enough to keep up with the growing demands of climate change."
"Over the last 50 years, Costa Rica's land surface temperature has increased by 2.5 degrees Fahrenheit and the researchers warned if the trend continues, sloths will be extinct by the end of the century."
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