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What are the symptoms of atrial fibrillation?
health.howstuffworks.com/diseases-conditions/cardiovascular/heart/how-atrial-fibrillation.htm
Atrial fibrillation is serious heart disease, but it's treatable if diagnosed early. Learn about EKGs, echocardiograms and other tests that detect AF symptoms.
Ancient Obliteration of Dwarf Planets May Have Created Saturn's Rings
science.howstuffworks.com/saturn-rings-4-billion-years-dwarf-planet.htm
Were Saturn's rings formed by the destruction of smaller planets? Learn more about new research on Saturn's rings in this HowStuffWorks Now article.
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.
A Greenland Shark Living Today Could Have Been Alive in 1620
animals.howstuffworks.com/fish/sharks/greenland-shark.htm
This denizen of the frigid deep not only lives a crazy long life, it also can grow up to 24 feet in length and eating its flesh can make humans "shark drunk."
Blind People Don't Always Have the Same Facial Expressions as Sighted People
health.howstuffworks.com/mental-health/human-nature/blind-people-facial-expressions-sighted.htm
How do the expressions of blind people differ from the sighted? Learn more about blind facial expressions from HowStuffWorks.
How can I find out if I have unknown relatives?
people.howstuffworks.com/culture-traditions/genealogy/find-out-about-unknown-relatives.htm
Wondering about your unknown relatives or need help wit your family tree? Find out how you can use technology to track down your unknown relatives.
Should Nature Have the Right to Sue in Court?
people.howstuffworks.com/nature-court-standing-right-sue-colorado-river.htm
How can the legal system protect the environment? Learn more about a suit calling for legal standing for Mother Nature in this HowStuffWorks article.
Why do we have eyebrows?
health.howstuffworks.com/human-body/systems/eye/question520.htm
Eyebrows do more than just add expressions to our faces. Find out the purpose of eyebrows and why everyone has eyebrows.
How Many Senses Do Humans Have?
science.howstuffworks.com/life/inside-the-mind/human-brain/question242.htm
We've all heard of a "sixth sense" and extra-sensory perception. So how many ways can we actually sense the world around us?
Wine Glasses Have Doubled in Size Since the '90s
recipes.howstuffworks.com/food-facts/much-does-favorite-wine-glass-hold.htm
A new study compares wine glass sizes from the last 300 years and the increase is shocking. Find out how much they've grown from HowStuffWorks.