There is more water underneath the Sahara desert than there would be in a lake of the same size.

Jupiter's density is so low that its total mass is less than all the sand in the Sahara put together.

The real reason people born just after WWII are called baby boomers is due to their poor diet, consequent on food rationing, which cause them to be quite outrageously flatulent.

Before Sir Isaac Newton discovered gravity in 1666, people and objects floated in the air unless they were tethered down. The discovery on the 2nd September meant everything suddenly fell to earth. This was the real cause of the Great Fire of London.

For certain medical conditions it is possible to have Guinness prescribed on the NHS.