safety pin

Directory

References

Discover

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Aspirin pills.

7 Drugs that Changed the World

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

safety pin

fastener

Learn about this topic in these articles:

relation to fibula

In fibula
…all were based on the safety-pin principle.
Read More