Search Results | planet
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How the Environment Has Changed Since the First Earth Day 51 Years Ago
It's been 51 years since the first Earth Day, and while progress has been made in some areas, humanity still has had a major impact on the planet.
What Is the Largest City in the World by Population?
people.howstuffworks.com/culture-traditions/cultural-traditions/largest-cities-in-world.htm
Of the 8 billion people now inhabiting this planet, almost 60 percent live in urban environments in some pretty densely packed cities. Here are the top 10 megacities in the world.
The Basic Astronomy quiz
play.howstuffworks.com/quiz/the-basic-astronomy-quiz
The night sky has fascinated humans throughout history. Even if you're not a science buff in general, we're willing to bet you know a thing or two about astronomy yourself. Find out just how much with our quiz!
Don't Miss Jupiter Shine Its Brightest in Almost 60 Years
science.howstuffworks.com/planetary-opposition.htm
Jupiter will pass closest to Earth at the same time it's at opposition. That means it will be the brightest it's been in the sky in decades.
Are You a Geography Guru?
play.howstuffworks.com/quiz/are-you-a-geography-guru
The world is a large and expansive place, with lots to know and discover. But just how much do you know about the lay of the land? Fancy yourself a geography guru? If so, take on our challenge to prove it.
Nebular Theory Might Explain How Our Solar System Formed
science.howstuffworks.com/dictionary/astronomy-terms/nebular-hypothesis-info.htm
The nebular theory, also known as nebular hypothesis, presents one explanation of how the solar system was formed, proposed by Pierre Simon de Laplace in 1796.
The Ultimate Astronomy Quiz
play.howstuffworks.com/quiz/astronomy-quiz
Though the astronomy field has evolved from its primitive beginnings, there's still a boundless cosmos to explore. Test your astronomy knowledge with our quiz.
How Horoscopes Work
entertainment.howstuffworks.com/horoscopes-astrology/horoscope.htm
Astrology holds that the relative positions of stars and planets have influence over the lives of human beings. Believers call it a science, while non-believers call it nonsense. Learn the basics of astrology.
How Long Does It Take to Get to Mars?
science.howstuffworks.com/long-does-it-take-to-get-to-mars.htm
Missions to Mars are increasing and the dream of landing a human on the red planet is no longer far-fetched - it might even happen in the next decade. So, how long does it take to get there?
Gorilla vs. Grizzly Bear: Which Is Bigger? Who Wins in a Fight?
animals.howstuffworks.com/animal-facts/gorilla-vs-grizzly-bear.htm
It’s the battle of the beasts: gorilla vs. grizzly bear. Picture a silverback gorilla facing off against a grizzly bear, two of the strongest and most iconic wild animals on the planet.