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Can animals be happy? Do they feel similar joyful emotions as humans? Take a look at research on whether animals can feel happy.

A Brazilian wax is a hair removal method. Visit HowStuffWorks to learn everything about a Brazilian wax.

Collagen lip treatments have become very popular. Visit HowStuffWorks to learn all about collagen lip treatments.

Hemangiomas are a type of birthmark. Learn more about how hemangiomas work at HowStuffWorks.

Lichen planus can be a bothersome condition. Visit HowStuffWorks to learn all about lichen planus.

Celiac disease is an autoimmune disorder -- more than just a food allergy to gluten. Read about celiac disease, symptoms and treatment.

A gluten-free diet means no wheat, barley or rye. Learn about gluten-free foods and how to eat a gluten-free diet.

Foursquare isn't just for the playground -- Foursquare is also a smartphone game with real rewards. See what Foursquare is all about.

What are the 5 things your skin needs every day? Take care of your skin with these 5 things your skin needs every day.

There are all sorts of materials used in patios these days. So what should you build yours with? Check out these top 5 materials used in patios.

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