In the Church of Jesus Christ of Latter-Day Saints (LDS) - which claims a membership of 15 million worldwide - any male from the age of 12 and "in good standing" can join the priesthood. No female can.

One in 10 of us is said to be anxious that 21 December marks the end of the world. The Ancient Mayans predicted this doomsday, and the press is eating it up. But where are all the believers?