J.N. Callahan Live Saving Device Size:16" x 20" The inner set of spiral

The inner set of spiral arms is highly warped out of the plane with one of the arms going behind the bulge and coming back out the other side

STS129-S-049 (16 Nov

How these two spiral patterns connect is still not precisely known

Photographer for the Detroit Publishing Company on 8x10 glass plate negative

The Magellan spacecraft imaged more than 98% of Venus at a resolution of about 100 meters

J.N. Callahan Live Saving Device Size:16" x 20" The inner set of spiralJ. N. Callahan in his Live Saving Device photographed by the Bain News Service May 24 1913 on 5x7 glass plate negative. Photo shows J. N. Callahan with a lifesaving device "Coxey's Life Saver and Water Wings."