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What Causes Brain Freeze?
Here's what’s happening in your body when you eat ice cream or drink a chilled beverage too fast.
BIG QUESTIONS
Why Can’t We Predict Earthquakes?
To predict quakes, scientists have to understand how they occur, what happens just before and during the start of one, and whether it shows signs that movement is imminent. So far, none of those things is known.
Why Do Cars Catch Fire?
A car accident in a movie usually ends in a huge fireball. But what really causes vehicle fires?
Why Are Some Flags Painted Backwards on Airplanes?
Depicting the mirror image of a flag on aircraft is done for a very specific (and very patriotic) reason.
Where Did the Expression ‘Gung Ho’ Come From?
We get this byword for enthusiasm from an officer in the Marines named Evans Fordyce Carlson.
Why Is Coffee Called a “Cup of Joe”?
There are many slang terms for coffee, but where does a “cup of joe“ come from? There are a few theories.
What Are Those Devices Basketball Players Are Holding on the Sidelines?
Athletes are embracing a new kind of performance enhancer.
Why Do We Call Someone a “One-Trick Pony”?
Maligning ponies has become a go-to way to dismiss someone. How did that happen?
Should You Sleep in the Nude? Here’s What the Experts Say
Sleeping in your birthday suit may feel good, but is it good for you?
Why Do Bridesmaids Traditionally Wear the Same Dress?
Bridesmaid traditions can get pretty bizarre, but the real reason behind why they usually wear the same dress is perhaps the most fascinating of all.
Why Are Brown LEGO Bricks So Brittle?
LEGO bricks are notorious for being indestructible, but one color is an exception.
What Happens When an Astronaut Gets Sick in Space?
Sick astronauts on a space mission can’t just pop down to Earth to see a doctor. Here’s how they deal with bumps, bruises, and worse.
Why Are Potatoes Called “Spuds”?
We dig down to the root of the issue.
Does Dish Soap Ever Go Bad?
Common household cleaning products like dish soap and laundry detergent might get forgotten about for years before being found and used. Will they still be effective?
Who Is the Man in the Moon?
People have been observing faces and figures on the moon for hundreds (if not thousands) of years. There’s a perfectly scientific explanation as to why.
Why Are Wedding Rings Worn on the Left Hand?
For years, couples have dedicated that finger to romance when any other digit would do.
How Do Astronauts Shower in Space?
Here on Earth, we tend to take showering for granted. But getting clean isn’t so easy without the force of gravity helping you out.
Why Do We Say “Right as Rain”?
Where did this curious expression come from, and what’s so right about rain, anyway?
Where Did the Saying ‘Stick Out Like a Sore Thumb’ Come From?
The phrase dates back to the 19th century, but it took a fictional 20th century detective to take its popularity to new heights.
Why Do We Say That Love Makes People Go “Weak at the Knees”?
In honor of Valentine’s Day, discover the origins of the phrase ‘weak at the knees,’ including its ties to ancient Rome and even astrology.
Why Do Some Chef’s Knives Have Dimples?
Also called scallops, these tiny indentations have a purpose. And it’s not just to make the knife look cute.
What Exactly Is ‘Dead Weight’?
Why your drunk friend feels so much heavier than your sober buddies.
Do Pillows Really “Expire”?
Pillows work tirelessly to hold your head up. Here's how to know when they've had enough.
Why Is the Flu Seasonal?
Like clockwork, flu viruses seem to strike more people in winter than in any other season—and there are several reasons for that.