Quantitative work shows clearly that natural selection is a reality, and that, among other things, it selects Mendelian genes, which are known to be distributed at random through wild populations, and to follow the laws of chance in their distribution to offspring. In other words, they are an agency producing variation of the kind which Darwin postulated as the raw material on which selection acts.

Science is vastly more stimulating to the imagination than the classics.

The advance of scientific knowledge does not seem to make either our universe or our inner life in it any less mysterious.

Money can buy a fine dog but it is kindness that makes him wag his tail.

I will jump into the river to save two brothers or eight cousins.

An ounce of algebra is worth a ton of verbal argument.

Quantitative work shows clearly that natural selection is a reality, and that, among other things, it selects Mendelian genes, which are known to be distributed at random through wild populations, and to follow the laws of chance in their distribution to offspring. In other words, they are an agency producing variation of the kind which Darwin postulated as the raw material on which selection acts.