We don’t know why the universe appears to be expanding faster than it should. New ultra-precise distance measurements have only intensified the problem.
A team in Paris has made the most precise measurement yet of the fine-structure constant, killing hopes for a new force of nature.
Recent experiments show that particles should be able to go faster than light when they quantum mechanically “tunnel” through walls.
Roger Penrose, Reinhard Genzel and Andrea Ghez were awarded the Nobel Prize in Physics for their studies of black holes.
Astronomers are discovering that magnetic fields permeate much of the cosmos. If these fields date back to the Big Bang, they could solve a major cosmological mystery.