Nature

Embryology and Evolution

I SHOULD like to comment on two letters by Mr. Haldane: one on “Natural Selection Intensity as a Function of Mortality Rate”, in NATURE of Dec. 6, and the other on “Embryology and Evolution”, in the ...
Nature

Embryology and Evolution

I HAVE read with much interest Prof. MacBride’s review entitled “The Problem of Epigenesis”, and I should like to make a few remarks upon what he says at the end. First of all, I wonder if the ...