What do you think about before you go to bed? When I was 7 years old, I had four bedtime fantasies mapped out in my mind, scene by scene. That way, when I drifted off to sleep, I would lucid dream through...

At 3:25 p.m., Wednesday, Jan. 14, 2015, Tommy Caldwell and Kevin Jorgensen ended a 19-day free-climbing expedition, ascending El Capitan’s Dawn Wall in Yosemite National Park. Although others had climbed...