Dangerous levels of mercury in Arctic ecosystems could be having a harmful effect on Arctic fox populations, according to research published in PLOS One on 6 May.

The 4-year-old fox can't help but giggle when it gets sleepy. Kristina Shafer/Facebook This giggling Arctic fox is the cutest animal you'll see on the Internet this week. Kristina Shafer shared ...

This giggling Arctic fox is the cutest animal you'll see on the Internet this week. Kristina Shafer shared adorable footage of Archer, her giggling 4-year-old fox, to Facebook on Mar. 13.

The 4-year-old fox can't help but giggle when it gets sleepy. Kristina Shafer/Facebook This giggling Arctic fox is the cutest animal you'll see on the Internet this week. Kristina Shafer shared ...

In a video posted to YouTube this month, a cute fox pup can be seen rolling around and nipping at a man's bare toes. Even the person videotaping can't help but "aww" at the cuteness.