It’s now thought that our ancestor, Homo Erectus, first used fire to soften meat 1.8 million years ago.

The now extinct turnspit dog or “underdog” was a breed of terrier bred to work in the kitchen, turning a wheel for a spit, much like a hamster runs around its wheel.

The halogen oven uses heating elements that convert electrical energy into intense heat. Infrared waves and an inbuilt high-performance fan helps circulate the heat to cook the food more quickly than in a regular oven. The ovens are much smaller than their conventional rivals – and about an eighth of the cost.

Solar ovens use only sunlight for energy, yet can reach cooking temperatures of 180 – 200C.