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Why are blueprints blue?
science.howstuffworks.com/engineering/structural/blueprints-blue-.htm
Why are blueprints blue and not some other color? There's a specific chemical process behind it, and its discovery has all the elements of a dark fairy tale.
Why Is Wombat Scat Shaped Like a Cube?
animals.howstuffworks.com/mammals/wombat-scat.htm
The shape of wombat scat closely resembles dice. Learn why wombat scat has such a distinctive shape and what this means for other animals in the area.
Why is exercise important for heart health?
Exercise is as important for heart health as eating right and avoiding stress. Learn about aerobic exercise and why it's so important for heart health.
Why are some people early birds and others are night owls?
health.howstuffworks.com/mental-health/sleep/basics/early-birds-and-night-owls.htm
Some people are early birds while others are clearly night owls. But why is that? Learn about the science behind early birds and night owls.
U.S. Coins Display No Numerical Values — Not Even the Government Knows Why
money.howstuffworks.com/us-coins-no-numerical-values.htm
Why aren't there numbers on American coins? The words "dime," "penny" and "nickel" sure don't convey anything obvious. Is the U.S. just being inhospitable to guests?
Why is there a metallic taste in my mouth?
health.howstuffworks.com/wellness/oral-care/problems/metallic-taste-in-mouth.htm
There are multiple reasons you may have a metallic taste in your mouth. Learn why there might be a metallic taste in your mouth.
What Are Prime Numbers, and Why Do They Matter?
science.howstuffworks.com/math-concepts/prime-numbers.htm
You may remember from math class that a prime number is a number that can only be divided by 1 and itself. But why are they important anyway?
Why do a child's bones heal faster than an adult's?
health.howstuffworks.com/human-body/systems/musculoskeletal/children-bones-heal-faster.htm
To heal bones faster, you might want to revert to childhood. But why do a child's bones heal faster than an adult's, anyway? Let's learn about bones.
Why Professional Bakers Never Measure With Cups, Only Scales
recipes.howstuffworks.com/tools-and-techniques/bakers-cups-or-scales.htm
While many home bakers measure out flour and other ingredients with a cup, experts say you should ditch that cup for a scale. Here's why.
Why do warthogs have warts?
animals.howstuffworks.com/mammals/warthog-warts.htm
Warthogs have warts to protect themselves against roughhousing among male warthogs. Learn why female warthogs have warts as well.