Piled Higher and Deeper (also known as PhD Comics), is a newspaper and webcomic strip written and drawn by Jorge Cham that follows the lives of several grad students. First published in 1997 when Cham was a grad student himself at Stanford University, the strip deals with issues of life in graduate school, including the difficulties of scientific research, the perils of procrastination, and the complex student–supervisor relationship. As of 2017, the strip's website received 6 million visitors each year.