One of the first things artist Shaun Gladwell tells me about his new virtual reality installation, Orbital Vanitas, is that I am about to enter a real human skull. You’re in space, a giant skull is orbiting Earth, and over the course of a few minutes, your disembodied floating self flies through it. Gladwell says he got the idea from Caravaggio’s painting Saint Jerome Writing, which features the ever-popular symbol of our own impending deaths, as well as a halo that reminded Gladwell of a celestial orbit.