In the 1800s, before modern bicycles, there was the penny farthing. It's the iconic bike with one giant wheel up front and a tiny wheel in the back. You might not know that it caused hundreds of injuries. Eventually, the modern bike came along and was initially called the "safety bicycle." So, why was the penny farthing so dangerous and what was the reason for the giant wheel in the first place?

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Pearls are iridescent spheres made of the same materials as an oyster's shell. So, why are they so much more beautiful than the shell itself? It all comes down to the life cycle of an oyster.

Here's a fun fact for your next holiday get together: The Catholic church is a leading force in space exploration. How? The church funds a massive space telescope in the middle of the Arizona desert. Researchers have used it to make countless discoveries and better understand the universe. But why is it in Arizona?

The modern skyscraper is one of the most extraordinary feats of human engineering. These cloud piercers have been built with steel since the beginning of the 20th century, but now some creative builders are starting to think outside the box. What if you made one completely out of wood? Is it possible? The answer is yes, and they are already being built.

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