In much the same manner that a print of man's hand or foot
leads to individual identification, so fossil footprints reveal
the kinds of creatures who unwittingly have left their mark
on the sands of time. Some four-footed animals, whose tracks
have been uncovered in ancient rock formations, furnish for
posterity only this evidence of a former existence. On the other
hand, tracks like those of a dinosaur convey something more
tangible. Scientific fact and popular fancy have done much these
days to make the layman dinosaur-conscious. But realization that
particular tracks were left by reptiles now long extinct comes
largely from demonstration that the skeletal parts and bodily
form of these animals correspond exactly to those surmised from
the imprints
