And if silver is turned into very small particles, it has antimicrobial properties that are not present in the bulk material.

ECONOMIST: Small wonders

In February last year a large solar flare erupted, disrupting flights over Pacific, but the bulk of the material emitted by the Sun passed by Earth.

BBC: MPs warn over nuclear space bombs and solar flares

Bulk buying of parts reduces each division's material cost (about 60% of the cost of an RV) by up to 4%.

FORBES: Lord of the Rigs

However the bulk of the course has remained a standard block of core material.

CNN: Degrees go for specialist redesign