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Why Don't We All Use the Same Time Zone?
science.howstuffworks.com/environmental/earth/geophysics/time-zone.htm
The world has only had time zones since the late 1800s. Some people think we should eliminate them and have just one universal time instead.
Why Don't You Ever See Square Vegetables?
science.howstuffworks.com/life/genetic/close-are-to-growing-square-tomato.htm
At least not in nature. Scientists have discovered the two gene families that play key roles in making fruits and vegetables either round or long. Could a square fruit be on the horizon?
Why Flash Floods Are So Dangerous
science.howstuffworks.com/nature/natural-disasters/why-flash-floods-are-so-dangerous.htm
Both dry and over-saturated soil can contribute to flash flooding. Can anything be done to prevent them from becoming catastrophic?
Why Fruit Flies Were the First Animals in Space
science.howstuffworks.com/why-fruit-flies-were-first-animals-in-space.htm
The little flies have way more in common with us than you think. And it made them the perfect test animal to send to space.
Why Golf Course Grass Looks So Perfect
science.howstuffworks.com/life/botany/question428.htm
How can the grass on the greens at a golf course be so perfect? What are they doing that's different from a normal lawn? Could my lawn look like this?
Why Is It Colder at the Top of a Mountain Than It Is at Sea Level?
science.howstuffworks.com/nature/climate-weather/atmospheric/question186.htm
Air temperature is colder on top of a mountain than at sea level, but if heat rises how is this possible? Learn about air temperature in this article.
Why Is Pluto No Longer Considered a Planet?
science.howstuffworks.com/pluto-planet.htm
On Aug. 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two resolutions that collectively revoked Pluto's planetary status.
Why Is an Asteroid Worth $10,000,000,000,000,000,000?
science.howstuffworks.com/psyche-16-asteroid.htm
A distant asteroid made mostly of iron is potentially worth $10,000 quadrillion, making it many times more valuable than the global economy.
Why Is the Krebs Cycle Essential for Life as We Know It?
science.howstuffworks.com/krebs-cycle.htm
The main function of the Krebs cycle is to produce energy, stored and transported as ATP or GTP, to keep the human body up and running.
Why Is the Ocean Different Colors in Different Places?
Ocean water is not actually blue, but appears in different shades for many reasons.