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How many planets in our universe could support life?
science.howstuffworks.com/planets--universe-support-life.htm
We don't know the answer to how many civilizations might exist in the universe. But we do know the factors that allow life on Earth. Are there other planets that fit the bill? Oh yes indeed.
7 Secret Caves We'd Love to See Inside
science.howstuffworks.com/environmental/earth/geology/secret-caves.htm
There are caves all over the world, but some are in places that are hard to explore - hidden by rocks, ruins or even under ice. We've found seven secret caves you probably never knew existed.
How to Troubleshoot a Hot Water and Steam Distribution System
Hot water and steam systems work similarly, and are still used in existing homes. Some routine maintenance is required to keep them working properly. Learn how to troubleshoot a hot water and steam system.
What Is the Chemtrails Conspiracy Theory?
science.howstuffworks.com/transport/flight/modern/what-are-chemtrails.htm
It's hard to look up in the sky on a clear day and not see a "cloud" trailing from an airplane. They're called contrails, though some refer to them as "chemtrails" and have odd explanations for their existence.
How Plug-in Hybrid Cars Work
auto.howstuffworks.com/car-models/plug-in-hybrids/plug-in-hybrid-car.htm
Plug-in hybrid cars build upon existing hybrid car technology by reducing the use of the gasoline engine. Find out how plug-in hybrid cars differ from standard hybrids.
Which Body Of Water Are You?
play.howstuffworks.com/quiz/which-body-water-are-you1
Different bodies of water exist all around us, everything from waterfalls to lakes to rivers to oceans. Which of these bodies of water are you? If you would like to know, then you should take this quiz!
The Evil Eye's Ancient Power Still Resonates Today
people.howstuffworks.com/evil-eye-meaning.htm
Belief in the evil eye has existed since at least 3300 B.C.E. and is found in Jewish, Islamic and Christian cultures of the Mediterranean and Middle East. But why has belief persisted for so long?
What If There Were No Such Thing As Illness?
science.howstuffworks.com/science-vs-myth/what-if/what-if-no-illness.htm
It's a crazy thought, but what if cancer didn't exist? And malaria, schizophrenia and every other illness that disrupts our normal functioning? Come along as we investigate what such a world might look like.
Can You Name All 35 Famous Works of Literature From a Description?
play.howstuffworks.com/quiz/can-you-name-all-35-famous-works-of-literature-from-a-description
Literature gives us a record of how humans have processed the joys and griefs of existence over the ages. How much of the record have you read? Let's test your knowledge of human experience with this quiz!
King Solomon: Fabulously Wealthy Monarch or Local Tribal Chief?
people.howstuffworks.com/king-solomon.htm
The biblical King Solomon is depicted as being very rich, very wise and very married to hundreds of women. But there is little evidence outside of the Bible that he existed. So what has been found so far?