When their razor-sharp mandibles wear out, leaf-cutter ants change jobs, remaining productive while letting their more efficient sisters take over cutting, say researchers. Their study provides a ...

A team of engineers at MIT led by C. Cem Tasan has discovered why steel razor blades go dull even when cutting hair that's 50 times softer than them. Using an electron microscopic, they found that ...

Razors may start sharp, but even though they only cut soft hair, they become dull surprisingly quickly. Now we know why blades that cut soft materials lose their edges so easily, which should help ...