There’s a historical reason, but there may be a social one as well.

BIG QUESTIONS
Suggestions for what to call the period of time from 2000–2009 ranged from ‘the nillies’ and ‘the oh-ohs’ to ‘the double zeroes’ and ‘the noughties.’ So how’d we land on ‘the aughts’?
Some dogs lift their leg to pee as a way of marking their territory. But they also do it as a way of letting other dogs know they're the baddest canine in town.
Pick-up truck beds are here to make your life easier—if you know how to use them.
The U.S. government has some ideas.
The key to holding court? A fresh can of tennis balls.
Astronauts spending time at the International Space Station stay hydrated with a refreshing, filtered blend of recycled shower water and pee.
According to experts, the answer is a lot shorter than you may think.
Code-switching goes beyond language—here's what it means and why it happens.
The concave circles built into the sides of plastic milk jugs are an important part of their design.
Horizontal lines run across the rear glass on most cars. Here's why.
Did 17th-century immigrants to the 13 colonies have modern British accents? First, we need to figure out what a “British accent” is.
All locusts are grasshoppers, but not all grasshoppers are locusts.
As brothers Bob and Doug McKenzie on ‘SCTV,’ actors Rick Moranis and Dave Thomas made ‘hoser’ popular—and there are plenty of theories about the word’s origin.
Chris Evert’s tennis bracelets made tennis bracelets a thing. But the origin story gets mistold quite often.
The adorable bear honey bottle design helped launch Dutch Gold Honey to national success. Here’s how it came to be.
Too much of anything, even a helpful or healthy thing, can hurt you. Medication? Definitely. Water? Absolutely. Exercise? You bet. Vitamins? Quite possibly.
Adaptability comes in handy. So does a belt.
Sadly, ‘PU’ isn’t an initialism for “Pretty unsavory!”, “Putrid, ugh!”, or even “Please use (deodorant)!”