A man cannot live more than 24 hours unless he has at least three cubic meters of air that is being constantly replaced.
He is better known for what he has promised to the sciences than for what he as actually done for them.
I consider nature a vast chemical laboratory in which all kinds of composition and decompositions are formed. Vegetation is the basic instrument the creator uses to set all of nature in motion.
The art of drawing conclusions from experiments and observations consists in evaluating probabilities and in estimating whether they are sufficiently great or numerous enough to constitute proofs. This kind of calculation is more complicated and more dif.