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What Was the Deepest Free Dive Ever Recorded?
entertainment.howstuffworks.com/deepest-free-dive.htm
Free diving is a breathtaking sport, literally and figuratively, requiring athletes dive to astonishing depths (recorded primarily in meters) on a single breath of air. Instead of using scuba gear, these free divers rely mainly on their own lungs to explore the depths of the ocean.
How Evolution Works
science.howstuffworks.com/life/evolution/evolution.htm
Evolution is fascinating because it attempts to answer one of the most basic human questions: Where did life, and human beings, come from? The theory of evolution proposes that life and humans arose through a natural process.
Can You Get More Than 11 Right on This Tree Knowledge Quiz?
play.howstuffworks.com/quiz/can-you-get-more-right-this-tree-knowledge-quiz
Trees aren't just idle objects in our world. They're living, breathing creatures that add tremendous value to human life, from shade, to lumber, to simple beauty and a lot more. What do you know about trees?
Smarter Than the Average American? Take This USA Quiz!
play.howstuffworks.com/quiz/smarter-than-the-average-american-take-this-usa-quiz
Hundreds of millions of people live in the USA, but very few of them know all that much about the country they live in. Do you fit in that category, or do you think you're smarter than the average American? Take our quiz on all things America to find out.
Why do cougars scream?
animals.howstuffworks.com/mammals/cougar-scream.htm
Cougars scream during mating season to attract the opposite sex. Learn how cougars scream and why humans don't hear these cougar screams too often.
13 Most Dangerous Fish, Eels and Sharks
animals.howstuffworks.com/fish/most-dangerous-fish.htm
Fish may seem harmless compared to larger predators on land, but some of the deadliest animals are hiding in the oceans and rivers throughout the world. From venomous stings to sharp teeth, the most dangerous fish species can be lethal to humans.
What makes a killer?
people.howstuffworks.com/what-makes-a-killer.htm
A killer is someone who finds it easy to take the life of someone else. Find out what makes a killer in this article from HowStuffWorks.
12 Freest Countries in the World, According to the HFI
people.howstuffworks.com/freest-countries-in-the-world.htm
Everyone probably likes to imagine that they live in one of the freest countries in the world, but is "freedom" something that can even be quantified? Is there a definitive way to say that my country is more free than your country?
There's More to Cannibalism Than Just People Eating People
people.howstuffworks.com/different-types-cannibalism.htm
Are there different types of cannibalism? Learn more about cannibalism in this HowStuffWorks Now article.
How Animal Testing Works
science.howstuffworks.com/innovation/scientific-experiments/animal-testing.htm
Animal testing has a long, gruesome history, but it's also saved countless human lives.