Caffeine is just one of the things that may be to blame for the irritating spasms.

BIG QUESTIONS
Andrew Jackson’s 1828 political campaign kicked it off, and cartoonist Thomas Nast made the political symbols really gain traction.
Yes, they‘re often bullet holes. No, that‘s not the only explanation.
They’re both fruit beverages, but apple juice and apple cider are not quite the same thing.
It‘s normal for cartoon characters to be missing a digit, but how did the style originate?
Popular theories involve pirates—and police.
Depending on how weird your home’s tap water tastes, it could be due to the pipes or an old water heater, or be a problem with the water itself.
Thanks to modern technology, you don’t usually need to separate your laundry—though it can still be beneficial in certain cases.
Here’s the history behind four-year presidential term limits, plus answers to all your other questions about presidential terms.
There's a good reason the metal hook on a tape measure wiggles, and it has to do with why the first inch is actually 1/16th of an inch short.
Synchronized swimming now goes by the name ‘artistic swimming.’ Here's why.
Volleyball doesn’t have goalkeepers, but it does have liberos—and the rules are a little different for them.
There are several reasons why a host country might see a boost in the Olympics medal count.
The big paper tags seen on Olympic track and field athletes are both high-tech tracking devices and sentimental souvenirs.
Sodas in the Aloha State look a little different from what you’re probably used to.