The eye chart with the big "E" on top is called a Snellen Chart.
John Green wrote tons of great pieces in his early days as a mental_floss contributor, and the “Not So Different After All” chapter in our book What’s the Difference might have been our favorite.
So, the strange thing about the first time I met John Green...
The Nerdfighter movement has recruited more than a few celebrities into its ranks, such as athletes, scientists, and statesmen.
John Green is very, very busy. Here's how he spends his time.
John Green’s led a remarkable life, and he’s never shied away from offering advice to aspiring scribes and storytellers of all ages. Here are 14 of his best pointers.
Here’s how John Green made a generation believe in the power of awesome.
In honor of his outstanding service to trivia buffs everywhere, here are 27 of the most remarkable tidbits John has shared with us over the years.
You may know John Green from one of his hugely popular YouTube shows (like ours!), or for his best-selling novels, or for selling out Carnegie Hall with his brother, or from the time he asked Presiden
On January 15, 1919, Boston suffered one of history’s strangest disasters: a devastating flood of molasses.
This week the Chicago Cubs unveiled a new mascot, Clark.
Western cultures often frown on the practice of eating insects of any sort.