How to Sharpen a Field Knife Without Destroying the Edge

Having a knife on hand when you are camping, hunting, or hiking is just good form. But if your knife blade is dull, then you may just be carrying another potential risk. Dull knife blades have a ...
Hackaday

NaCl Casting Technique Really Earns Its Salt

Sodium Chloride has a melting point of 801 C (1,474 F), putting it comfortably between commonly-cast materials like aluminum ...

Modern surgery began with saws and iron hands – how amputation transformed the body in the Renaissance

Amputees in 16th century Europe commissioned iron hands from artisans, many of whom had never made prostheses before. Lernestål, Erik, Livrustkammaren/SHM, CC BY-SA The human body today has many ...