There are a few possibilities for why small dogs can be so menacing.
Life's Little Mysteries answers fascinating questions about the world around you and the stuff in it, including wild questions you didn't even know you had.
And check out our "Life's Little Mysteries" podcast, where we answer questions about mysteries big and small — about ancient civilizations; our planet and solar system; the plants and animals that live alongside us; our bodies and how they work; and more. Listen in on Apple podcasts, Spotify and Audioboom.
It's impossible to know for sure the deadliest day in U.S. history because you can end up comparing apples with oranges.
Biologists recently caught a 7-foot-long sturgeon in the U.S. but there are much bigger fish lurking in Earth's rivers. What's the biggest freshwater fish in the world?
During the so-called Super Flower Blood Moon lunar eclipse, the face of the moon will turn a brick-red hue. Here's why.
Human laughter may trace its evolutionary beginnings to vocalizations made during play. This type of "laughing" is found in many mammals and even in some birds.
Humans may be heart-attack-prone because of a mutation that keeps us from making a particular sugar molecule.
There are many ways the world could end, from all-out nuclear war to a giant asteroid strike. How many people would need to survive such an apocalypse for humans to avoid extinction?
From what it stands for, to how it's celebrated, here are a few fun facts about the Mexican holiday Cinco de Mayo.