If there is anything you think astronomers would have figured out by now, it is how stars form. The basic idea for how stars form goes back to Immanuel Kant and Pierre-Simon Laplace in the 18th century, and the details of how they shine and evolve were worked out by physicists in the first half of the 20th century. Today the principles that govern stars are taught in middle school, and exotica such as dark matter dominate the headlines. It might seem that star formation is a problem that has been solved. But nothing could be further from the truth. The birth of stars remains one of the most vibrant topics in astrophysics today.