Salman Hameed in The Guardian:
Millions of individuals in the UK believe in UFOs and ghosts. Yet we know that there is no credible evidence for any visitation from outer space or for some dead souls hanging out in abandoned houses. On the other hand, there is now overwhelming evidence that humans and other species on the planet have evolved over the past 4.5bn years. And yet 17% of the British population and 40% of Americans reject evolution. It seems that for many there is no connection between belief and evidence.
Some – maybe most – of the blame can be attributed to an education system that does not train people to think critically. Similarly, most people do not understand methodologies of science and the way theories get accepted. For some, scientific evidence has no role in the way they envision the world.
People who claim to have been abducted by aliens provide an interesting example. The “abductions” happen mostly in the early morning hours and, apart from psychological trauma, there is no physical evidence left behind. Some scientists have attributed these episodes to sleep paralysis – a momentary miscommunication between the brain and the body, just before going to sleep or waking up.
While abductions have most likely not taken place, the trauma experienced by the individuals may still be real.