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Where Did 'Separation of Church and State' Come From? A radical immigrant is arguably responsible for church-state concept.
How Much Urine Can a Healthy Bladder Hold? A healthy adult bladder can hold up to 16 ounces of urine comfortably.
Does Washing Fruits and Vegetables Make Them Safe? Washing fruits and vegetables only removes some of the bacteria.
Can Plastic Bottles Make You Sick? Bisphenol-A, a plastic ingredient, may be on your mind — its safety has been questioned.
Why Are 250 Million Sperm Cells Released During Sex? The average male will produce about 525 billion sperm cells over a lifetime.
What Does 'Fast Metabolism' Mean? Metabolism refers to the calories the body uses at rest.
Why do wintergreen candies spark in the dark? Why do wintergreen candies spark in the dark?
What is a Theory? The word theory is frequently misused and misunderstood when applied to a range of ideas from evolution to gravity.
Can Animals Predict Earthquakes? Hours before China's worst earthquake in three decades, animals at a local zoo began acting strangely.
Is Optimism Good For You? Is Optimism Good For You?
Why Do People Sleepwalk? Lack of sleep, genetics, childhood and apnea are some of the causes of sleepwalking.
Does Recycling Plastic Cost More Than Making It? economic success or failure of plastics recycling relies various costs.
Why are Broken Bones Lethal to Horses? Second-place Derby winner was euthanized after bone injuries.
Is Yogurt Really Good for You? The yogurt section in the grocery store has gotten pretty complicated.
How Do Birds Navigate? About 50 animal species use Earth's magnetic field for navigation.
How Do Hallucinogens Work? Scientists are bringing lucidity to how hallucinogens work.
Is a Dog's Mouth Cleaner Than a Human's? Can a dog's mouth really be cleaner than a human's, despite all the leftover macaroni they chew?
What's a Second Cousin vs. a First Cousin Once-Removed? There's a simple way to figure out the relationships between relations.
Are Big Brains Smarter? Humans boast the biggest brains, relative to body size, in the animal kingdom.
Why Do We See Stars When Sneezing? "Stars" while sneezing are caused by stimulation of the back of the eye.
Can Peanut Butter Go Bad? PB is gooey and delicious, yet it can remain at room temperature for months.
What is the Longest-Living Animal? The animal with the most birthdays goes to ...
Can Animals Tell Time? Rats are able to keep track of how much time has passed since they discovered a piece of cheese.
Why Do We Have Fingernails? We have fingernails because we're primates.
When Did April Fool's Day Begin? No one knows when or why the celebration of practical jokes and pranks began.
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