Big lies are told by governments, politicians and corporations to avoid responsibility, cast blame on the innocent, win elections, disguise intent, create chaos and gain power and wealth. Big lies are as old as civilisation. They corrupt public understanding and discourse, turn science upside down and reinvent history. They prevent humanity from addressing critical challenges. They perpetuate injustices. They destabilise the world. The modern age has provided ever-more-effective ways of spreading lies but it has also given us the scientific method, which is the most effective tool for...