This fun puzzle will help to boost your focus, attention to detail, and visual thinking. Ready to try? Start the timer and ...

"Whenever I take Grinch out in public, people are always curious about what kind of cat he is," Hope Sgro told Newsweek.

Cats (and dogs) have a high concentration of rod receptors and a low concentration of cone receptors. Humans have the opposite, which why we can't see as well at night but can detect colors better.

Cats (and dogs) have a high concentration of rod receptors and a low concentration of cone receptors. Humans have the opposite, which why we can't see as well at night but can detect colors better.