Mental Floss

BIG QUESTIONS









Dog whistles can make training easier.

The ultrasonic training instruments are easy to use. But there’s a dark history behind their inventor—and their initial purpose.

Jake Rossen
A fantastic blep.

We asked an expert to help us investigate the adorable causes of the tongue-lolling phenomenon.

Jake Rossen
















MRSA bacteria bound to a neutrophil, a type of infection-fighting white blood cell.

Public health officials are concerned that we could move back into a situation like that of the early 20th century, before antibiotics were discovered.

Tara Smith