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Pain is subjective - what is excruciating to you might be tolerable to me. Which is why it's so difficult to measure and control.

HowStuffWorks looks at what oxytocin is and whether it really promotes love and bonding.

Calico cats are almost all female. And they inherit their looks from their mothers. HowStuffWorks explains the genetics behind these unusual cats.

Fungi are extremely diverse organisms with a penchant for dead things. HowStuffWorks gets to know them.

Every year, a version of the flu vaccine must be developed, to compensate for the changes in the flu virus the year before. Will that ever end?

How many bugs do I eat every year? More than you think! Find out how many bugs you eat every year at HowStuffWorks.

If you have trouble sleeping you might have been told to get a white noise machine. But white isn't the only color of noise out there.

The world's population is expected to hit 8 billion Nov. 15 2022. Is that too many people or just right?

The U.S. has some of the longest highways in the world, but the nine longest are scattered all over the globe.

Your phone might look clean, but in reality, it's harboring germs, viruses and bacteria. So stop doomscrolling in the bathroom.

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