"They are not physiologically suited for this." Officials issue warning about troubling tourism trend: 'Hides immense ...

More than 20 U.S. travelers returning from Cuba have tested positive for Oropouche virus, also named sloth fever, the Centers for Disease Control and Prevention said on Tuesday, as the little known ...

Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...