Mechanical properties are physical properties that a material exhibits upon the application of forces. Examples of mechanical properties are the modulus of elasticity, tensile strength, elongation, ...

Welcome to Nat Geo Your Shot: National Geographic’s global community for aspiring visual storytellers. Find the community on Instagram @NatGeoYourShot and follow along for hashtag challenges, tips, ...

On February 18, 1943, with World War II raging in Europe and Asia, a hulking structure rolled onto the tarmac of Boeing Field, about five miles south of Seattle’s city center. Veteran Boeing test ...

The post-Cold War era brought a renaissance of private security companies (PSCs) and private military companies (PMCs). Both state and non-state actors have frequently relied on their services, as ...