What is the Planck time?

The Planck time is an incredibly small interval of time that emerges naturally from a few basic quantities in theoretical physics. When it was discovered by Max Planck at the end of the 19th century, it seemed to be no more than a scientific curiosity. But today it plays a tantalizing role in our understanding of the Big Bang and the search for a theory of quantum gravity

Here’s a summary of everything we know about the Planck time: where it came from, what it is, and what it might reveal about the way the universe works.