Known to science only since 1968, it seems to have disappeared.

This would be only the second specimen known to science.

Fifth force: There are four forces of nature known to science.

At the hospital she was given every test known to medical science.

The smallest form of life known to science just got smaller.

A short section is given to each of some 115 elements known to science.

However, the species had been known to science long before then.

Nothing known to science can make predictions about systems like that.

Given time, the team believes the area could yield species not yet known to science.

The doctor was using every means known to medical science to prolong his life.