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How Old Is Earth and How Did Scientists Figure It Out?
science.howstuffworks.com/how-old-is-earth.htm
In 1953, CalTech geochemist Clair Patterson came up with an estimate for Earth's age that still holds today.
10 Cretaceous Animals That Weren’t Dinosaurs
animals.howstuffworks.com/animal-facts/10-cretaceous-animals-that-werent-dinosaurs.htm
Not all Cretaceous animals were dinosaurs. See 10 other animals in the Cretaceous period that roamed the Earth.
Who Invented the Toilet? A Brief History of the Flush
science.howstuffworks.com/innovation/everyday-innovations/toilets-past-future-flush.htm
Who invented the toilet? While we wish it were so, it wasn't Thomas Crapper. Surprisingly, toilet design hasn't changed much since the first "water closet" patent in the 1500s.
We'll Give You a Tool, You Tell Us What Job It's Associated With
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You can often tell what job a person does just by looking at the tools they use. If you are up to speed with the tools of the various professions, can you match the three tools we’ll show you to the worker who uses them? Get started and find out!
What Are Frankincense and Myrrh?
science.howstuffworks.com/life/botany/question283.htm
The three wise men in the story of Christmas carried gold, frankincense and myrrh. What are frankincense and myrrh? Can you still get them these days?
What Is Pi?
science.howstuffworks.com/math-concepts/pi.htm
Whether the circle is as big as planet Mars or as small as a tennis ball, the ratio of its circumference divided by its diameter will always equal pi (3.14). But why?
10 Advancements in Environmental Engineering
science.howstuffworks.com/engineering/civil/10-advancements-environmental-engineering.htm
Environmental engineering existed long before it had a name. It began at the dawn of civilization when we started changing our surroundings to meet our needs.
Aldebaran: The Brightest Star in the Constellation Taurus
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Aldebaran is not just the brightest star in the constellation Taurus, it's also the 14th brightest star in the sky.
How Fingerprinting Works
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Fingerprinting is a popular technique for identifying criminals and authenticating access. Learn about fingerprinting and its storied history.
10 Treasures We'll Lose as Sea Levels Rise
science.howstuffworks.com/environmental/earth/oceanography/10-treasures-lose-sea-levels-rise.htm
HowStuffWorks looks at 10 of the most notable spots in danger of rising sea levels due to climate change.