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Are UFOs Real? Close Encounters of the First, Second and Third Kinds
science.howstuffworks.com/space/aliens-ufos/ufo-classification.htm
UFO siting classification Classification has six categories: nocturnal lights, daylight discs, radar/visual cases, and close encounters. Read more about UFO classification.
Are Unicorns Real? Proof, Theories and Lore
Would they be a mating display? A fierce weapon to defend against lions?
Are We Entering the Sixth Major Extinction on Earth?
science.howstuffworks.com/life/evolution/sixth-major-extinction.htm
A new global report says 1 million species are at risk of extinction - the greatest number in human history.
Are Zombies Real? 10 Reasons the Undead Can't Walk Among Us
The undead are frightening, brain-hungry monsters, lumbering toward their victims with great purpose. But wait. Can they even digest brains?
Are animals still evolving?
science.howstuffworks.com/life/evolution/are-animals-still-evolving.htm
Evolution is a never-ending process, but some scientists believe it might be speeding up as human activity impacts the environment.
Are climate skeptics right?
science.howstuffworks.com/environmental/green-science/climate-skeptic.htm
Climate skeptics believe that climate change is a natural process, rather than the work of man. Learn about different climate skeptic arguments.
Are geothermal power plants safe?
science.howstuffworks.com/environmental/energy/geothermal-power-plants-safe.htm
For all our hand-wringing over the oil supply, it might shock you to realize that the solution to our dependence on fossil fuels lies right under our feet.
Are humans the smartest animal?
science.howstuffworks.com/life/inside-the-mind/human-brain/humans-smartest-animal.htm
Are you wondering if humans are the smartest animals? Learn if humans are the smartest animal on earth in this article.
Are kids happier than adults?
science.howstuffworks.com/life/inside-the-mind/emotions/kids-happier-than-adults.htm
From an adult's point of view, kids have it made, spending their days playing and goofing off, with no responsibilities to worry about. But are kids really jumping for joy more often than the rest of us?
Are lab rats really prone to cancer?
science.howstuffworks.com/innovation/scientific-experiments/lab-rats-cancer.htm
Are lab rats really prone to cancer? Find out whether lab rats are really prone to cancer at HowStuffWorks.