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Why do Chili Peppers Taste Hot? Compounds in chili peppers trigger body's pain response.
What is a Monsoon? if it isn't a storm, then what is it?
How Much Mail is Sent Each Day? You'd never guess how mow much mail goes out everyday.
Do Fireworks Scare Pets? Yes, and here's what you should do.
How Much Water is on Earth? Even though there's plenty of water, is it enough for everyone?
What is a Stem Cell? Embryonic tem cells can morph into any cell in the human body.
What is Heat Stroke? Hot days can not only be uncomfortable, but deadly too.
Why Does Ice Cream Cause Brain Freeze? Theories abound to explain this lightning-quick headaches, but the best advice? Eat slowly.
What is a Dry Thunderstorm? How can you get the lightning without the rain?
Can Matter Travel at Light Speed? Photons have a ticket to travel at light speed-but what about matter?
Can the Moon Cause Earthquakes? Probably not, but Earth might make moonquakes!
What is Smog? Just what is in that brown, hazy layer of air around you?
When a Hurricane Approaches, Should I Open the Windows or Tape Them? What not to do during a hurricane.
What is the Doppler Effect? The Doppler effect describes the difference between a sound and its source.
What is a Carbon Sink? Natural carbon storage systems may be blocked by global warming.
How Are Diamonds Made? Natural diamonds come from the Earth, but they can also come from a machine.
Does Boxing Cause Brain Damage? Research has long shown that head trauma - something no boxer can avoid -- puts one at risk for permanent brain damage.
How Are Utensils Made? General-purpose forks, knives and spoons are made from steel, an alloy whose main ingredient is iron.
Do Plants Have Sex? Plants know how do it in all sorts of kinky ways.
Will Eating Pet Food Kill Me? Chowing down pet food may not be as safe as it used to be.
Why are Frogs Disappearing? Kermit the Frog is more right now than ever: It’s not easy being green.
How Do Scientists Date Ancient Things? Love-hungry teenagers and archaeologists agree: dating is hard. But while the difficulties of single life may be intractable, the challenge of determining the age of prehistoric artifacts and fossils is greatly aided by measuring certain radioactive isotopes.
Why Do You Stink? Don't get offended! You could be hyper-hygienic and you'd still ooze odors. Even grosser, bacteria's to blame.
Does the Heart Ever Skip a Beat? There's nothing romantic about your heart skipping a beat, whatever the poet might say.
What Does the Sun Burn? We all know that there is no air in space, and therefore no oxygen to burn.
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