Rembrandt "Danaë", 1636), seeking to emulate the baroque style of Rubens. With the occasional help of assistants in Uylenburgh's workshop, he painted numerous portrait commissions both small ("Jacob de Gheyn III") and large ("Portrait of the Shipbuilder Jan Rijcksen and his Wife", 1633, "Anatomy Lesson of Dr. Nicolaes Tulp", 1632). By the late 1630s Rembrandt had produced a few paintings and many etchings of landscapes. Often these landscapes highlighted natural drama, featuring uprooted trees and ominous skies ("Cottages before a Stormy Sky", c. 1641; "The Three Trees", 1643). From 1640 his work became less exuberant and more sober in tone, possibly
The Doctor (Doctor Who) night and the storm in the heart of the sun, he's ancient and forever, he burns at the centre of time..." and "the man who can turn an army around at the mention of his name". Though the Doctor tends to present a jocular, even childlike, persona, when the stakes rise—e.g., in "Pyramids of Mars" (1975)—that mask tends to fall, revealing a Doctor who is cold, driven, at times callous. This dark side sits in contrast to the Doctor's deep compassion, which manifests to different strength and effect across their incarnations. The Doctor prefers a pacifist solution to most problems,