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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.
How Trailer Roof Vents Work
auto.howstuffworks.com/auto-parts/towing/equipment/accessories/trailer-roof-vents.htm
Trailer roof vents are helpful to have in any enclosed towing apparatus. Learn about trailer roof vents at HowStuffWorks.
What Causes Tides? High and Low Tides Explained
science.howstuffworks.com/environmental/earth/geophysics/tide-cause.htm
The oceans' levels change daily across the globe. We know them as tidal changes. But what causes this constant shift in sea level and why is it more dramatic is some places than others?
Are all stock car tracks the same?
auto.howstuffworks.com/auto-racing/nascar/race-tracks/stock-car-race-tracks.htm
Stock car race tracks differ in size, racing surface and track configuration. Learn all about stock car race tracks at HowStuffWorks.
How Diesel Two-Stroke Engines Work
auto.howstuffworks.com/diesel-two-stroke.htm
Diesel two-stroke engines are used to power locomotives, large ships, and generating facilities. Find out how a diesel two-stroke engine works.
The Brain and Nervous System
health.howstuffworks.com/human-body/systems/nervous-system/brain-nervous-system-ga.htm
The nervous system is a network of specialized tissues that regulates thoughts, emotions, actions, sensations, and basic body functions. Learn more.
How to Replace a Wall Switch in 10 Steps
home.howstuffworks.com/home-improvement/repair/how-to-replace-a-wall-switch.htm
Wall switches help us turn on and power a wide variety of lights, fixtures and appliances. But what if a wall switch were to stop working? Learn how to replace a wall switch with the information in this article.
What does it take to eradicate a disease?
health.howstuffworks.com/medicine/modern-technology/eradicate-disease.htm
It can be difficult to eradicate disease -- it has only been accomplished once. Take a look at what has to happen to eradicate disease at HowStuffWorks.
Scientists Detected a Space Hurricane for the First Time. What's That?
science.howstuffworks.com/nature/climate-weather/atmospheric/space-hurricane.htm
In 2014, scientists observed a space hurricane for the first time; they reported their findings this year. But what's a space hurricane - and do we on Earth have to worry about with them?
The Ancient Swedish Vallhund Dog Was Almost Lost to History
animals.howstuffworks.com/pets/swedish-vallhund.htm
The energetic and friendly Swedish Vallhund was originally bred more than 1,000 years ago and was saved from extinction in 1942.