It is caused by a large mass of gray matter known as the inferior olivary nucleus.

"The sun is the largest collection of matter known to astronomers," the canned voice began.

The findings also seemed to challenge the standard model of neutron stars, until now the most extreme form of matter known to scientists.

No form of matter known to man could endure it.

The only other biological matter known to approximate the toughness of keratinized tissue is chitin.

Perhaps Harkness doesn't want the matter known.

Changes in white matter known as amyloid plaques are associated with Alzheimer's disease and other neurodegenerative diseases.

For obvious reasons, he went on, writing slowly as he formed the thought, I do not wish to make this matter known officially.

Protomatter was one of the most volatile forms of matter known to exist.

Increasingly deep analysis can explain the internal dynamics of the matter being studied, and eventually to prediction, known as estimation.