Early Stages of Stellar Evolution and Masers

A mighty stream of tendency.

Pouter, tumbler, and fantail are from the same source;
The racer and hack may be traced to one Horse;
So men were developed from monkeys of course,
Which nobody can deny.

Aristotle especially, both by speculation and observation... reached something like the modern idea of a succession of higher organizations from lower, and made the fruitful suggestion of "a perfecting principle" in Nature. With the coming in of Christian theology this tendency toward a yet truer theory of evolution was mainly stopped, but the old crude view remained...