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Your search for "could" returned 13,344 results
'Nightingale' Floors Served as Security Warning System in Ancient Japan
In 17th century Japan, wealthy citizens built homes with "nightingale floors" that squeaked, warning them of intruders. In fact, the floors squeaked louder when the steps got lighter.
Lapis Lazuli Found in Teeth of Medieval European Woman
The pigment ultramarine was as expensive as gold in medieval Europe; so how did it end up in the teeth of a nun buried at a monastery in rural Germany?
The Superb Moon Quiz
science.howstuffworks.com/superb-moon-quiz.htm
Find out what you really know about moons, supermoons and moon landings with our HowStuffWorks quiz.
Ancient Egyptian Pregnancy Test Survived Millennia Because It Worked
A strange, but surprisingly accurate, ancient Egyptian pregnancy test survived for millennia and was spread around Africa and Europe because it was just that effective.
Research Confirms It: We Really Are Getting Dumber
A new study shows that IQ levels have been falling since 1975, reversing a 20th-century trend.
Can two parents claim head of household?
You both pay the bills, and you both raise the kids, so does the IRS see you both as heads of households? Read more at HowStuffWorks.
Why do people avoid stepping on cracks?
people.howstuffworks.com/why-do-people-avoid-stepping-on-cracks.htm
Generations of pedestrians have avoided stepping on cracks to prevent their poor mothers' backs from being broken. Is there a reason for this practice?
What's in a Nickname? The State Nickname Quiz
history.howstuffworks.com/american-history/state-nickname-quiz.htm
What does it mean to be from the 'Show-Me' state or to be a Sooner? Find out how vast your state nickname knowledge is with our HowStuffWorks quiz!
Velociraptor Alert: The Feathered Dinosaur Quiz
science.howstuffworks.com/environmental/earth/geology/feathered-dinosaur-quiz.htm
Test your knowledge of the fluffy, winged dinos of the bygone Mesozoic era, from little Microraptor to the enormous Yutyrannus with this quiz.
Why don't women have Adam's apples?
health.howstuffworks.com/human-body/parts/why-dont-women-have-adams-apples.htm
Ever wonder why women don't have Adam's apples? The answer isn't as simple as you might think. Learn more about Adam's apples at HowStuffWorks.