The Raw Materials of Evolution, Edițiile 38-45

action of prolactin activity appear appreciation of nature aspects atomic nucleus behavior birds blood bodily growth body broodiness CARNEGIE INSTITUTION cells changes chemical elements chromosome climate concerning crop culture cycle DEPARTMENT OF TERRESTRIAL drought earth effect electrical electromagnetic electrons elements energy environment estrin evolution fact fields genes grasses grazing high-voltage ideas important increase influence of science injections of prolactin INSTITUTION OF WASHINGTON interaction interest inverse-square law investigation knowledge known liver luteinizing hormone mammary gland Maya civilization means measure mechanics ment methods mone mutations neutrons normal nuclear forces observed organs ovary PANCREAS particles period Photo by courtesy physical pigeons pituitary gland pituitary hormones Plains population possible present problem produced progesterone prolactin protons rainfall rats region relation repulsion scattering scientific short-grass soil species structure sun-spot synergism TERRESTRIAL MAGNETISM things thyrotropin tion values voltage volts wave-mechanics wheat