Interesting fact: The Mary Rose, built in the 15th Century, had its hull almost entirely made from English oak. As a result, it was able to survive over 400 hundred years under the sea until it was hauled up to be put in a museum in Portsmouth, where it can be seen today. Enough said
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They certainly are, Iroko for example as very high anti bacterial properties. Butchers cutting boards are wood for the purpose of killing bacteria.