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What is an atomic clock and how does it work?
science.howstuffworks.com/question40.htm
Many ads for new clocks advertise their ability to automatically synchronize themselves with the atomic clock in Boulder, Colorado. This atomic clock is more precise because it uses the frequencies of atoms as its resonator.
North American B-25 Mitchell
science.howstuffworks.com/north-american-b-25-mitchell.htm
The North American B-25 Mitchell was efficient, easy to manufacture and repair, and able to do any job assigned to it. No other twin-engine bomber of World War II saw greater production. Learn the specifications and uses for this handsome bomber.
Why do I need an electrical adapter when I travel overseas?
science.howstuffworks.com/innovation/science-questions/question430.htm
Although technology is helping to make the world seem a lot smaller, there are still major differences between countries. Learn about electrical standardization around the globe.
Is it safe to bleach my skin?
health.howstuffworks.com/skin-care/problems/treating/safe-to-bleach-skin.htm
Is it safe to bleach my skin? Find out if bleaching skin is safe at HowStuffWorks.
Fearless Females: Our Women's History Quiz
history.howstuffworks.com/historical-events/womens-history-quiz.htm
These pioneering women bring new meaning to the phrase, "girl power!" Test your IQ of some of the baddest women in history with our quiz.
Which Part of the World Did You Live In, in Your Past Life?
play.howstuffworks.com/quiz/which-part-of-the-world-did-you-live-in-in-your-past-life
If you believe in reincarnation, it can be fun and interesting to consider where or when you might have lived before and what kind of person you might have been. Take this quiz to find out if you were a fisherman on the open seas, a king or a playwright.
What human activities increase carbon dioxide in the atmosphere?
science.howstuffworks.com/environmental/green-science/human-activities-increase-carbon-dioxide.htm
Although a certain amount of carbon dioxide (CO2) occurs naturally in the Earth's atmosphere, there are several human activities that increase levels of the greenhouse gas.
The Woodlouse Spider Only Has 6 Eyes
animals.howstuffworks.com/arachnids/woodlouse-spider.htm
Let's talk about the woodlouse spider, an arachnid with a unique hunting style and impressive jaws. Known scientifically as Dysdera crocata, this spider has a special knack for preying on woodlice, making it an unusually dominant predator in its ecosystem.
Neanderthals Were Actually Prehistoric Picassos
science.howstuffworks.com/life/evolution/neanderthals-were-actually-prehistoric-picassos.htm
New research shows that homo sapiens weren't the first folks to decorate their caves with artwork. Neanderthals actually did it thousands of years earlier.
Gender-specific Bathrooms Are a Relatively Recent Invention
history.howstuffworks.com/history-vs-myth/gender-specific-bathrooms-recent-invention.htm
What's the history of gender-specific bathrooms? Learn more in this HowStuffWorks Now article.