Wildfire smoke traveled far beyond the flames this summer, blanketing these 25 U.S. cities with the worst air quality.

As promised, you’ll find the answer key below to all 25 questions. Happy Monday, and check back with us at Mental Floss for ...

The ancient Romans valued travel, and visited Greek islands, the Pyramids of Giza, the Olympic Games, and various bathhouses, among other destinations.

They say no matter where you go, there you are. But what they don’t mention is that so is the moon, its loyalty especially evident when it swells to fullness ea ...

Can you identify if all 42 things are a place or food in that short of time? It won’t be easy! So, how’d you do? Even if you ...

Reminded of these obnoxious Vikings, early internet users in the ‘90s started using the words “spam” and “spamming” to refer ...

The most fun states to visit in 2026 are California, Florida, Illinois, Nevada, and New York.

Mount Vesuvius buried the Campania region of Southern Italy and its inhabitants in ash, rock, and pumice in AD 79. This thick blanket of volcanic materials bloc ...

Much like earlier decades, the 2000s had plenty of movies and characters that became household names and defined genres. The ...

Here at Mental Floss, we’ve launched a Trivia of the Day series, delivering 25 new questions daily that revolve around ...

Still, a 2025 survey found that children ages 5 to 8 spent an average of 3 hours and 38 minutes using screen media, while a 2021 report found that tweens ages 5 to 12 spent over 5 hours on screens ...

Trademarking the blue was, however, not enough. The US Open also claimed the green color used just outside the in-bounds ...