Pulled from the Otis Historical Archives National Museum of Health and Medicine. It is a skull.
There are no hand rails around the Grand Canyon keeping your far from the edge in the early 1900s and it makes for a theme in the photography of perching on the edge. Pulled from the New York Public Library digital collection.
Let’s step away from Wikipedia and Wikimedia and look to the National Museum of American History. These images were taken two years before From the Earth to the Moon was published. I’m sure being able to see the moon as the sphere it is for the first time was quite inspiring.