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Cyanosis: Why Your Fingers Turn Blue

health.howstuffworks.com/diseases-conditions/cardiovascular/heart/cyanosis.htm

It might be OK for a Smurf to have blue fingers, but for the rest of us, it's something you don't want to see. Cyanosis is usually a sign of a bigger health problem.

Lychee Is an Underrated — but Seriously Sweet — Fruit

recipes.howstuffworks.com/lychee.htm

You might have seen lychees at an international farmers market and not known they were lychees. The dark red fruit looks a bit like raspberries and are packed with sugar.

St. Francis Is Credited With Creating the First Nativity Scene in 1223

people.howstuffworks.com/culture-traditions/holidays-christmas/first-nativity.htm

The earliest biblical descriptions don't mention animals by the manger when Jesus was born. So how did those Nativity scenes evolve into what we know today?

What Is the Rarest Blood Type in the World?

health.howstuffworks.com/human-body/systems/circulatory/rarest-blood-type.htm

There are eight major blood types and some are more common than others. But what's the rarest of them all?

Going Nuts for Nuts Could Improve Your Health

health.howstuffworks.com/wellness/food-nutrition/facts/going-nuts-for-nuts-could-improve-health.htm

A slew of new research suggests eating more nuts is not just good for your heart, but it's also good for your waistline. HowStuffWorks investigates.

What's the Difference Between Macronutrients and Micronutrients?

recipes.howstuffworks.com/difference-between-macronutrients-micronutrients.htm

What are micronutrients and macronutrients and why are both important for living a healthy lifestyle? HowStuffWorks lets you in on all the details.

How Airlines Clean Planes So Quickly

science.howstuffworks.com/transport/flight/modern/airlines-clean-planes-quickly.htm

Cleaning an airliner for the next flight is a complex undertaking that must be carried out rapidly. And it's even more important now during the coronavirus pandemic.

Why Can We Hear Others' Footsteps, But Not Our Own?

science.howstuffworks.com/life/inside-the-mind/human-brain/why-can-hear-others-footsteps-but-not-own.htm

HowStuffWorks looks at a new study trying to determine why we can hear other people's footsteps but not the ones we make.

Furry Friends Can Aid Your Health

health.howstuffworks.com/wellness/preventive-care/furry-friends-can-aid-your-health.htm

Furry friends can aid your health as you get older. Learn how furry friends like dogs and cats can aid your health in old age at Discovery Health.

5 Reasons Child IDs are a Good Idea

health.howstuffworks.com/pregnancy-and-parenting/5-reasons-child-ids-are-good.htm

Child IDs are recommended by law enforcement agencies to help keep your child safe. See other reasons why child IDs are a good idea.

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