Roborock has teamed up with Mental Floss to explain why space is a vacuum—all while pushing the boundaries of smart cleaning technology back on Earth.

ALL STORIES
From rabbits to butterflies, learn the surprising origins of these animal names.
The pop-up Halloween giant is hoping to become a force in the Christmas market.
There are many reasons why horses might need shoes. There’s pretty much only one reason why cows don’t.
We give you an obscure word with four definitions—one correct, three made up. Can you identify the correct one?
“Once upon a midnight dreary” begins “The Raven,” setting the mood for one of the most recognizable poems written in English.
We ran the lyrics of a hit song through multiple languages, then translated them back into English. Can you figure out what the song is, or who performed it?
The nagging pain in your neck may feel tight, but it's knot what you think.
From phrasal verbs to loanwords, here's how English speakers repeat themselves without realizing it.
Crystal balls aren’t just a prop in your Halloween décor—they represent our ancient desire for otherworldly knowledge.
If you want to lessen your impact on the environment, consider moving to one of these metro areas.
Ever wonder why dogs love to dig holes? We asked an expert to explain the behavior—and how to stop it.
You didn’t have to be out casting spells and stirring bubbling cauldrons in the dead of night to be at risk of being labeled a witch in the 1600s. Would you have been one of the accused?
Both are places where we bury the dearly departed, and the words are often used interchangeably. But that hasn’t always been the case.
These delicious sauces will have you shoving ketchup and mayonnaise aside.