The world that Edgar Rice Burroughs made.
MY ADVENT ON MARS
I opened my eyes upon a strange and weird landscape. I knew that I was on Mars; not once did I question either my sanity or my wakefulness. I was not asleep, no need for pinching here; my inner consciousness told me as plainly that I was upon Mars as your conscious mind tells you that you are upon Earth. You do not question the fact; neither did I. I found myself lying prone upon a bed of yellowish, mosslike vegetation which stretched around me in all directions for interminable miles. I seemed to be lying in a deep, circular basin, along the outer verge of which I could distinguish the irregularities of low hills. It was midday, the sun was shining full upon me and the heat of it was rather intense upon my naked body, yet no greater than would have been true under similar conditions on an Arizona desert. Here and there were slight outcroppings of quartz-bearing rock which glistened in the sunlight; and a little to my left, perhaps a hundred yards, appeared a low, walled enclosure about four feet in height. No water, and no other vegetation than the moss was in evidence, and as I was somewhat thirsty I determined to do a little exploring. Springing to my feet I received my first Martian surprise, for the effort, which on Earth would have brought me standing upright, carried me into the Martian air to the height of about three yards. I alighted softly upon the ground, however, without appreciable shock or jar. Now commenced a series of evolutions which even then seemed ludicrous in the extreme. I found that I must learn to walk all over again, as the muscular exertion which carried me easily and safely upon Earth played strange antics with me upon Mars. Instead of progressing in a sane and dignified manner, my attempts to walk resulted in a variety of hops which took me clear of the ground a couple of feet at each step and landed me sprawling upon my face or back at the end of each second or third hop. My muscles, perfectly attuned and accustomed to the force of gravity on Earth, played the mischief with me in attempting for the first time to cope with the lesser gravitation and lower air pressure on Mars. I was determined, however, to explore the low structure which was the only evidence of habitation in sight, and so I hit upon the unique plan of reverting to first principles in locomotion, creeping. I did fairly well at this and in a few moments had reached the low, encircling wall of the enclosure. There appeared to be no doors or windows upon the side nearest me, but as the wall was but about four feet high I cautiously gained my feet and peered over the top upon the strangest sight it had ever been given me to see. The roof of the enclosure was of solid glass about four or five inches in thickness, and beneath this were several hundred large eggs, perfectly round and snowy white. The eggs were nearly uniform in size being about two and one-half feet in diameter.
—A Princess of Mars, Edgar Rice Burroughs