In an autobiographic note Charles Robert Darwin (February 12, 1809 – 1882) remembered a childhood wish:
“It was soon after I began collecting stones, i.e., when 9 or 10, that I distinctly recollect the desire I had of being able to know something about every pebble in front of the hall door–it was my earliest and only geological aspiration at that time.“
Darwin today is mostly associated with terms like natural selection and evolution, but his first scientific achievements and publications were dealing – even against his own preconceptions – with geology.
A good history lesson for your Sunday. Well worth reading.