Imagine a tribe of uncontacted hunter-gatherers in the deepest Amazon rainforest. Anthropologists airdrop dozens of ...

The pair, who hatched their plan over more than 1200 messages to each other over several months, had tried to recruit other students and were in the grips of a shared delusional disorder when they ...

An autistic boy who took his mother’s life as the first step in a plan to overthrow the government was experiencing a rare shared delusional disorder, a court has been told. Details of the ...