Tucker Manton

A translator retells a complex novel in another language, but only if the plot stands still. Once the characters start moving, the translator loses the thread. That's roughly how the 'double copy' worked — a method linking gravity and electricity. Until recently, it could only handle static black holes, where time plays no role.

Dark energy — the mysterious substance responsible for the accelerated expansion of the universe — may not be a constant factor but a variable force.

Light from the hottest stage of the universe has been traveling toward us for nearly 14 billion years. This is the cosmic microwave background — a faint glow filling the entire sky.