"Anaximandros... pupil and companion of Thales, was like him an astronomer, geographer, and physicist, seeking for a first principle (for which he invented the name); affirming an infinite material cause, without beginning and indestructible, with an infinite number of worlds;—and still showing the Chaldean impulse—speculating curiously on the descent of man from something aquatic, as well as on the form and motion of the earth (figured by him as a cylinder), the nature and motions of the solar system, and thunder and lightning. It seems doubtful whether, as affirmed by Eudemus, he taught the doctrine of the earth's motion; but that this doctrine was derived from the Babylonian schools of astronomy is so probable that it may have been accepted in Miletos in his day."