What do we know about spontaneous human combustion?

"A fire that burns without an obvious source of ignition isn't possible...right? In What Do We Know About Spontaneous Human Combustion?, curious young readers will explore all we know about this odd phenomenon, its history, and suggested theories and explanations. Can spontaneous human combustion be caused by something called ball lightning? Or can it be explained by something called the wick effect? From the infamous spontaneous combustion of Ma...