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Your search for "scientific theory" returned 562 results
How Hiccups Work
health.howstuffworks.com/diseases-conditions/respiratory/hiccup.htm
Hiccups are those annoying, involuntary fits that make it nearly impossible to carry on a conversation. Find out how hiccups work.
Why Do Gorillas Beat Their Chests?
animals.howstuffworks.com/mammals/gorillas-beat-chests.htm
It's a behavior synonymous with gorillas - beating the chest. But why do they do it? Researchers think they've figured out what the purpose is behind that pounding.
Why Humans Scream, Make Crazy Faces When Terrified
science.howstuffworks.com/life/inside-the-mind/human-brain/why-humans-scream-when-scared.htm
Wouldn't keeping quiet help us get away from whatever's scaring us? What's the science behind the weird face and raw shout?
Can You Answer These Basic Science Questions Everyone Should Know?
play.howstuffworks.com/quiz/can-you-answer-these-basic-science-questions-everyone-should-know
Science! It's the basis for nearly everything that sets our age apart. Still, you can't have satellites, Twitter or Netflix without the basics. How well do you know them?
Why Peter A. Browne Bizarrely Collected Hair
people.howstuffworks.com/culture-traditions/cultural-traditions/peter-a-browne-hair-collection.htm
Peter A. Browne put together a magnificent collection of hair. HowStuffWorks takes a look at the collection and how it was saved from the dustbin.
Every Single Living Thing Is Part of an Ecosystem. Here's How They Work
science.howstuffworks.com/life/biology-fields/ecosystem.htm
How do we consider a Thing with no edge? Ecosystem ecologists are always trying.
Evolution by Natural Selection: Examples and Effects of Adaptation
science.howstuffworks.com/life/evolution/natural-selection.htm
Natural selection is the idea that organisms that are best suited to survive pass their traits down. Is it true that only the strong survive?
10 Times Humanity Found the Answer (and Then Forgot)
history.howstuffworks.com/10-times-humanity-found-answer-and-then-forgot.htm
Could humanity be even farther ahead if we hadn't forgotten what we'd learned centuries ago? Learn about 10 times we forgot answers at HowStuffWorks.
10 Times It Has Rained Something Other Than Water
Frogs! Fish! Birds! A surprising number of things have rained down from the sky besides water. But how?
10 Ways Animals Supposedly Predict the Weather
Next time the cat starts sneezing, should you look for your umbrella or check her out for allergies? There are many superstitions out there about animals and weather prediction. Which ones hold water, and which ones are for the birds?