The scientists suggested that the microscopic grains of silicon carbide they found were probably formed in the atmosphere of one or more red dwarf stars.

Researchers at many corporate laboratories are now focusing on the microscopic grains that make up the ceramics, and particularly the boundaries between the grains, as possible sources of trouble.

Replies: I think there is one place in their brains which has a cluster of microscopic grains of iron oxide.

In metal plasticity, for example in steel, the size of a dislocation is sub-grain size while for soil it is the relative movement of microscopic grains.

(Hayabusa returned microscopic grains of asteroid material in 2010, and Stardust returned cometary dust in 2006.)

Contrary to an opinion sometimes expressed, people do not have rocks in their heads, although their inner ears do contain some microscopic grains of calcium carbonate called otoconia.

However most magnetic materials are polycrystalline, composed of microscopic crystalline grains.

Millions of microscopic grains of gold dust or tungsten powder are coated with the genes and fired into wheat grain tissue consisting of millions of cells.

When exposed to light the silver nitrate decomposes to produce microscopic grains of silver, which appear black.

The meteoroid that punched through both layers of the plastic was a nearly microscopic grain of dust.