1. May is National Burger month, celebrating the famous and popular fast food.

2. It is thought that they originated New York in the 19th century from a recipe popular with German immigrants from Hamburg.

3. They didn’t really catch on in the States until they were sold at the World Fair in St Louis in 1904.

4. The first fast food restaurant, which sold hamburgers for just 5 cents, opened in 1921.

5. Sixty per cent of sandwiches sold globally are actually burgers.

6. McDonald’s sells 75 or more burgers every second.

7. Hamburgers were called Liberty Sandwiches by American soldiers during the Second World War because they wanted to avoid a German name.

8. The Fleur de Lys in Las Vegas offers The FleurBurger, made with Kobe beef and topped with foie gras and black truffles. It also comes with a 1990 bottle of Chateau Petrus,  for $5,000.

9. Veggie burgers are popular in India where the majority Hindu population does not eat beef and the Muslims don’t eat pork.

10. Burger King is called Hungry Jack’s in Australia.