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How Does a Hippo Make Its Own Sunscreen?
animals.howstuffworks.com/mammals/hippo-sunscreen.htm
Hippo sunscreen is actually the thick sweat that hippos produce to protect their skin from the sun. Learn why red hippo sunscreen is such powerful stuff.
Does light attract sharks?
animals.howstuffworks.com/fish/sharks/light-attract-sharks.htm
Light attracting sharks is a theory that suggests sharks are drawn by bright, shiny, yellow and light-colored objects. Learn about light and sharks.
Can we live elsewhere in the universe?
science.howstuffworks.com/can-we-live-elsewhere-in-the-universe.htm
If you consider throwing down a welcome mat on the porch of the International Space Station the same as living "elsewhere," then yes. But what about the moon and destinations beyond?
Countries That Start With 'Z' and How They Got Their Names
history.howstuffworks.com/world-history/countries-that-start-with-z.htm
If you were to explore the world alphabetically, you'd find 27 countries starting with "s" - like Spain, Sweden and South Africa - each with its own rich history and vibrant culture. But when you get to "X," the map draws a blank; no countries start with that elusive letter.
What are the Nazca lines?
science.howstuffworks.com/science-vs-myth/unexplained-phenomena/nazca-lines.htm
Long before crop circles captured the world's imagination, a Peruvian culture called the Nazca went about creating a series of intricate lines -- sometimes in the shapes of animals -- on the desert floor. But how'd they do it -- and why?
Have invasive species caused any extinctions?
science.howstuffworks.com/environmental/green-science/have-invasive-species-caused-extinctions.htm
Introducing a new species into an ecosystem can have unforeseen and disastrous consequences for the species that already live there.
What If Mosquitoes Went Extinct?
science.howstuffworks.com/science-vs-myth/what-if/what-if-mosquitoes-went-extinct.htm
Imagine going outside in the summer and not being eaten alive by mosquitoes. Yeah, no mosquitoes! Well, don't celebrate just yet, because a world with no mosquitoes might have a radically different food chain.
Can an Electric Eel Kill You?
animals.howstuffworks.com/fish/can-electric-eels-kill.htm
Electric eels actually aren't eels at all, but they certainly are electric. Their shock can kill animals in surrounding waters, but could it take down a human?
Nearly 1,000 U.S. Streets Named After MLK Jr. What Are They Like?
people.howstuffworks.com/government/local-politics/streets-named-after-mlk.htm
Researchers investigated the racial makeup and economic well-being of 22,286 census blocks in the U.S. with roadways bearing Dr. Martin Luther King Jr.'s name. Here's what they found.