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Can I feel pregnant when my wife is?

health.howstuffworks.com/pregnancy-and-parenting/pregnancy/issues/sympathy-pregnancy.htm

Sympathy pregnancy is the condition where a man feels pregnant while his wife actually is. Learn more about the symptoms for sympathy pregnancy.

Why do you have two lungs but only one heart?

health.howstuffworks.com/human-body/systems/circulatory/two-lungs-one-heart.htm

The two lungs-one heart system evolved because that was all we needed to survive. Learn more about the evolution of the two lungs-one heart system.

Diuretics 101

health.howstuffworks.com/medicine/medication/diuretics.htm

Diuretics are used to treat a wide variety of conditions. Learn about diuretics in this article and find out what conditions diuretics can treat.

How Carrier Battle Groups Work

science.howstuffworks.com/carrier-group.htm

How does one of the most valuable pieces of military equipment travel around the world? When they move, an entire fleet of protective air and water craft moves with them. Learn all about carrier battle groups.

Making 'The Incredibles'

entertainment.howstuffworks.com/incredibles.htm

For 'The Incredibles,' CGI masters at Pixar tackled the Holy Grail of computer animation: realistic humans. See what the creative team told us about producing this mega hit.

Benefits of Exercise

health.howstuffworks.com/wellness/diet-fitness/exercise/benefits-of-exercise.htm

Regular physical activity can improve heart health, strength, and endurance. Explore the many other mental and physical benefits of exercise.

Betrothed Through the Centuries: A Timeline of Marriage

people.howstuffworks.com/marriage-timeline.htm

Today's version of marriage looks very different from the unions enjoyed by our ancestors. For most of human history, marriage was more akin to a business deal between men, and the bride in question had very few rights or other options. So how did marriage become associated with love?

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