Flick picks: 'Ex Machina,' 'Clouds of Sils Maria' explore creation and humanity from isolation

Breakthroughs in science and art require isolation, a couple of new specialty titles suggest. In “Ex Machina” and “Clouds of Sila Maria,” a tech genius and an accomplished actress hole up in mountain retreats as they struggle to take their current projects to the next level, accompanied by assistants who challenge their approaches and assumptions...