But not everyone wants to know what their DNA says about them. What if you found out you had a high propensity for developing a rare, incurable disease?

He is gifted with rare eloquence.

Purple is a very rare color in nature; some people consider it to be artificial.

The extraterrestrials may be out there, and we might learn much by discovering them, but it is paranoia of a rare sort that would shutter the Earth out of fear that they might discover us.

The past few weeks, however, have been one of those rare phases.