The average person in 1800 travelled no more than about 50 metres each day from their homes. Today we travel an average of 50 kilometres each day.
 
A survey in the UK in 1989 showed that if a man spent more than 80 per cent of his time with his partner between sexual acts, she was almost never unfaithful to him. Less time than that though, and the chances of her infidelity increased significantly, rising to over 10 per cent if he spent less than 10 per cent of his time with her.
 
It is a myth that heart disease is a man's disease. In fact, cardiovascular diseases are the number one killer of women (and men). These diseases currently claim the lives of more than a half a million females every year - more than the next 16 causes of death put together.
 
Men have more blood in their circulatory system than women and more red blood cells.
 
Huntington's disease, which became notorious when it killed the folk singer Woody Guthrie in 1967, was first diagnosed by a doctor, George Huntington, in 1872 on the Eastern tip of Long Island.
 
Manic depression affects 1.2 percent of Americans aged 18 or older annually, or 2.2 million individuals. Approximately equal numbers of men and women suffer from the condition.
 
In 1973, scientists discovered receptors for opiates on neurons in several regions of the brain that suggested the brain must make substances very similar to opium.
 
No word in the English language rhymes with month, orange, silver or purple.
 
Telly Savalas and Louis Armstrong died on their birthdays.
 
The human brain contains 100 billion brain cells.
 
Ingrowing toenails are hereditary.
 

Most Americans in the highest-earning one percent of the population (median annual income: $330,000) don't consider themselves rich according to a Worth-Roper Starch Survey.
 
Despite the name, the Salmonella bacteria that cause severe gastric problems have nothing to do with fish. The first example was discovered in 1885 in cholera-suffering pigs, by an American pathologist called Daniel Elmer Salmon.
 
A wedding ring is generally exempt by law from inclusion among the assets in a bankruptcy estate. That means that a wedding ring can't be seized by creditors, no matter how much the bankrupt person owes.