They have a very rare condition called rod monochromacy which means that they completely lack cone cells in their eyes. As a result all sloths are colour-blind, can only see poorly in dim light ...

4. They would fail an eye exam. Sloths aren’t exactly known for their sharp senses, and this is especially true for their ...

Because of this cry these sloths are sometimes called ais (pronounced “eyes”). Three-toed sloths also have an advantage that few other mammals possess: They have extra neck vertebrae that ...

It’s a close cousin of Ebola that’s been dubbed the “bleeding eye” virus due to one of its symptoms. Marburg, Mpox and Oropouch (commonly called “sloth fever”) are spreading in ...