Why do humans have an appendix? New research is reshaping our understanding of this overlooked organ and its antiquated role ...

Untreated appendicitis may cause your appendix to rupture (burst), resulting in an infection. Symptoms associated with a ruptured appendix include severe abdominal pain, fever, chills, and weakness.

Most people know only two things about the appendix: You don't need it—and if it bursts, you need surgery fast. That basic story traces back at least to Charles Darwin, the English naturalist who ...