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How Nitrous Oxide Works
science.howstuffworks.com/nitrous-oxide.htm
At the same time scientists discovered that nitrous oxide could numb agonizing pain, they also found it could make you really lightheaded and silly. Yes, huffing parties started in the 1700s.
Strokes Overview
health.howstuffworks.com/mental-health/neurological-conditions/stroke.htm
Stroke is the third leading cause of death in the United States and the leading cause of permanent disability. See if you're at risk for a stroke.
What are the future limits of replacement parts for the human body?
health.howstuffworks.com/medicine/modern-technology/replacement-parts-for-human-body.htm
There are replacement parts for the human body being developed every day. Find out if there are limits to replacement parts for the human body.
The Cougar Technically Isn't a 'Big Cat'
animals.howstuffworks.com/mammals/cougar.htm
The cougar, also known as Puma concolor, is one of the most adaptable and widespread cat species in the Americas. You can find this elusive predator, commonly referred to as a mountain lion or puma, across a vast range that extends from the southern tip of South America to the wilds of Canada.
Meghan Markle Is Not the First British Royal With African Heritage
Although there's been a lot of talk about Meghan Markle being the first mixed race person to marry into the British royal family, historians say that's not really true.
The Flying Snake Doesn't Fly So Much as Fall With Style
animals.howstuffworks.com/snakes/flying-snakes.htm
To some, the thought of snakes flying through the air is the scariest thought imaginable, but, as we'll explain, flying snakes don't actually fly, they "fall with style."
Alertness in the Womb
A fetus's alertness in the womb may surprise you. Learn about alertness in the womb at Discovery Health.
6 Wild Cats Still Found Roaming the U.S.
animals.howstuffworks.com/mammals/wild-cats-in-us.htm
HowStuffWorks takes a look at six large cats still to be found existing in the wild in the United States.
Could You Really Outrun a Tyrannosaurus Rex?
animals.howstuffworks.com/dinosaurs/outrun-tyrannosaurus-rex.htm
OK, hop in your time machine, find a T. rex and challenge it to a race. Who'd win? Find out if you could outrun a Tyrannosaurus rex at HowStuffWorks.
The Firearm Safety Quiz
play.howstuffworks.com/quiz/firearm-safety-quiz
Getting flippant with guns can cost you dearly. How much do you know about firearm safety? Take this quiz to find out.