Ọ bụ ya bụ onye nnata nke ọtụtụ ndị ọkà mmụta sayensị enọ na na bụ onye so ọtụtụ nnukwu mụtara ọha mmadụ, gụnyere Royal Society (ebe 1974), ndị Pontifical Academy nke Sciences (ebe 1986) na National Academy nke Sciences USA.
