The eye chart with the big "E" on top is called a Snellen Chart.
Tis the season, and if you're like a lot of gift-buyers out there, Dad is both the easiest and the hardest family member to shop for -- sure, you can always get him golf clubs or bottles of fancy
I'm not colorblind, I'm just "green-weak." At least that's what I tell everyone.
Everyone says they want to be home for the holidays, but for homeless animals, this wish is often an impossible dream.
The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid (the red square).
The only total lunar eclipse of 2010 will be visible from all of North America on Monday night/Tuesday morning.
From Shilo, there is nothing to fear except fear itself … unless you lack the ability to fear!
In case you weren't obsessively refreshing mentalfloss.com all week, here's what you
Don't forget that the most important holiday (trivia) party of the season, the mental_floss TRIVIA SHOW, is tonight!!!
When it gets this close to Christmas, you can barely turn around without spying someone in a Santa suit.
From Shilo, a fascinating link about impossible-to-see colors (or how to possibly train yourself to see them). Reminds me a tad of my link from awhile back about testing your Color I.Q.
This may sound made up, but Alyssa Milano has been one of our biggest supporters over the years.
Take some time on this last weekend before Christmas to enjoy some holiday cartoons you might remember from your childhood.
Puppets: fun child’s play or horrifying, nightmare-inducing reasons to visit shrinks later in life? I'm terrified of them - even if they're dog puppets. Or bacon
Earlier this month, Matt Melis released a 45-minute video showing a Space Shuttle launch with professional commentary on what you're seeing in each shot.