The Conundrum of Premonition

Serious scientific researchers who study paranormal subjects are most perplexed by premonitions or precognition. This is because the phenomenon seems to fly in the face of logic, let alone physics. Time can only travel forwards and the future is not ours to know. Yet this most peculiar of happenings does occur and can be documented.
This is a brief exploration of the ideas, research and practicalities of premonition experiences and introduces the idea that there are two types of premonition/ precognition; classic precognition and mass precognitive warnings.