English is easy, check how confusing it is for an English speaker to learn a language that has more specific. http://tvslo.si/predvajaj/kako-postanes-slovenec-how-to-become-slovene-1-del/ava2.155437318/ Abusive comment hidden. (Show it anyway.)
You probably meant Michelangelo. He was the unhygienic one, not Leonardo.
Actually there was refrigeration. In the winter they'd put ice on straw in cellars dug in the ground, made from massive stones and it would last almost for the whole year. It was used in Europe for thousands of years, up until electricity and refrigerators.
There was also another way of preserving meat, you'd put it in barrels full of lard. Some farmers still use this technique today.
There was thumbs turned (lat. Pollice verso or verso pollice).
From the historical and literary record it is uncertain whether the thumb was turned up, turned down, held horizontally, or concealed inside the hand to indicate positive or negative opinions.
Desmond Morris said that the "tumbs down" motion was the thumb motion representing the plying of a sword. So from afar it would look like "tumbs down".
The notion of the pollice verso thumb signal was brought to popular attention by an 1872 painting by French history painter Jean-Léon Gérôme titled Pollice Verso (http://upload.wikimedia.org/wikipedia/commons/c/c5/Jean-Leon_Gerome_Pollice_Verso.jpg)...
That's like 3x leathal dose...
His predictions were almost on point.
Paper's ignition temperature is 450°C (842°F) or 218°-246°C (424-474°F)[@http://en.wikipedia.org/wiki/Autoignition_temperature]
Bradbury mixed up his Fahrenheit with his Celsius. [@http://garydexter.blogspot.com/2009/05/76-fahrenheit-451-by-ray-bradbury.html]
Much better & more eye friendly...