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Can You Name All of These World Heritage Sites?
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We only have one Earth, and the easiest way you can show your appreciation for it is by recognizing its brilliance. Some of the world's most endangered animals, oldest cities and rarest land formations are protected in World Heritage Sites around the globe. Put your skills to the test and see if you can recognize them all.
What is the urban heat island effect?
science.howstuffworks.com/environmental/green-science/urban-heat-island.htm
Cities are often hotter than rural areas because of the urban heat island effect. Learn what an urban heat island is.
How to Spray Paint Metal
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Make your metal look like new by learning how to spray paint metal. Learn about how to spray paint metal in this article.
What do SPF numbers mean?
health.howstuffworks.com/skin-care/beauty/sun-care/spf.htm
SPF numbers were introduced to measure a sunscreen's effect against UVB rays. Learn about SPF numbers and find out how high SPF numbers can go.
All About the Vaquita, the Most Endangered Marine Mammal
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The vaquita is the most endangered marine mammal in the world. Abundance estimates place the total vaquita population at about 10 individuals.
How the EPA Works
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The EPA was established in order to protect human health and the environment. Learn more about the EPA and some of the duties the EPA performs.
Folic Acid Benefits
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Folic acid benefits the body in a variety of areas, and it's becoming a pillar of nutritional medicine. Learn how folic acid benefits your health.
All About the World Wildlife Fund
animals.howstuffworks.com/endangered-species/world-wildlife-fund.htm
The World Wildlife Fund works to protect wildlife and their habitats all over the globe. Learn about the World Wildlife Fund organization.
Gray Wolves Will Get Federal Protection Again in Much of U.S.
animals.howstuffworks.com/mammals/gray-wolves-endangered-news.htm
A federal judge reversed a Trump administration ruling that removed the gray wolf from the Endangered Species Act. Here's why.
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.