Photo Clue MC #5 Clue (click photos to enlarge) "We have nacreous or mother-of-pearl clouds, a phenomena seen only in _______. Actually they are not really clouds as such. What happens? Ice crystals in the frozen atmosphere at 50,000 feet become illumined by the suns rays coming over the horizon." Back to Today's Report Copyright 1999 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to our feedback form