There's a reason why two caps are better than one.

BIG QUESTIONS
The sophisticated cephalopods have highly evolved vision and can use jet propulsion to escape predators, but there are a few key differences between squid and cuttlefish.
People often confuse funnel clouds with tornadoes, but they're not the same. Learn how to tell the two apart.
It's to get the blood flowing—or is it?
In events where success or failure can be measured in tiny increments, it’s not surprising athletes will turn to any potential advantage. But does cupping actually work?
America is the only country that refuses to do so.
There’s a lot of cultural and religious significance attached to this enduring Jewish wedding tradition. Plus, it’s just plain fun.
The fabric strawberry is more than just a cute accessory to an already cute accessory. It also serves as an important tool.
There’s a historical reason, but there may be a social one as well.
The most popular Chinese takeout dish in the U.S. is a sweet, spicy, saucy chicken entree named after a famous Hunanese general who actually preferred pork.
Consumer tastes have shifted over the past 20 years.
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.
It's what every shower-taker dreads—but it doesn't have to be this way.