‘Interstellar’ is a bumpy, exhilarating ride

Interstellar begins at an indeterminate point in Earth’s future, when blight and drought are pushing humanity to the breaking point. “This world is a treasure, but it’s been telling us to leave for a long time now,” laments engineer-turned-farmer, Cooper (Matthew McConaughey). He’s a practical man who set aside dreams of space travel in order to provide for his family, and yet his powerful intellect keeps him sneaking glances skyward. When he and his precocious daughter, Murph (Mackenzie Foy), decipher mysterious signals directing them to random GPS coordinates, Cooper is only too eager to indulge his curiosity.