The Poison Belt is a science fiction novella by Sir Arthur Conan Doyle. Professor Challenger sends telegrams requesting three friends to join him at his home and asks each of them to 'bring oxygen'. They are led into a sealed room, along with Challenger and his wife. During his studies into a variety of phenomena, Challenger has calculated that the Earth is moving into a belt of toxic ether which he believes will suffocate humankind, but not before complete chaos erupts on Earth...