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11 of the World's Worst Serial Killers
people.howstuffworks.com/10-worlds-most-prolific-serial-killers.htm
Some serial killers have murdered more than 100 people. Who are the worst serial killers, and why did they do it?
How the U.S. Draft Works
people.howstuffworks.com/us-draft.htm
While the U.S. has no draft currently, it does require military registration via the Selective Service System. What does that mean and what would happen if a draft was reinstated?
How a Symbiotic Relationship Works
science.howstuffworks.com/life/evolution/symbiosis.htm
Symbiosis can be mutually beneficial, helping two creatures survive in a hostile environment. Learn about the different forms of symbiosis.
Egg Donation Overview
health.howstuffworks.com/pregnancy-and-parenting/pregnancy/fertility/egg-donation.htm
Egg donation is one option for women or couples with fertility problems. Learn about egg donation and find out what it takes to be an egg donor.
Why are people's brains different sizes?
science.howstuffworks.com/life/inside-the-mind/human-brain/brain-size.htm
Brain sizes in humans differ, but why? And who has the bigger brain, men or women? Let's take a look at human brain sizes and see if size matters.
How Rat Rods Work
auto.howstuffworks.com/rat-rod.htm
Rat rods are one-of-a-kind hot rods that are rusty, weathered, beaten and occasionally full of bullet holes. Read more about rat rods at HowStuffWorks.
Airline Travel for Pets Guide
animals.howstuffworks.com/pets/pet-travel/airline-travel-for-pets.htm
Airline travel for pets can be complicated, especially if you don't have the required materials. Learn all about airline travel for pets at.
Is morality located in the brain?
science.howstuffworks.com/life/inside-the-mind/emotions/morality-located-in-brain.htm
Is morality located in the brain? The concept of morality and the field of neuroscience are overlapping in MRI. Find out if morality is found in the brain.
How the Bioscleave House Works
home.howstuffworks.com/bioscleave-house.htm
The Bioscleave House, is a home constructed in New York that will have its residents living forever. See what the Bioscleave House looks like.
How Chiggers Work
animals.howstuffworks.com/arachnids/chigger.htm
Chiggers are tiny bugs that are known for delivering bites that itch intensely. Find out how chiggers work and learn about the chigger reproduction cycle.