I did not know that! I've never seen them growing - just think they're a pretty ugly fruit (a fuzzy fruit? yuk), until peeled and cut open, and they remind me of pansies then! LOL
They grow mostly in Australia. They will grow here according to catalogs, but I think the last time I checked they were about $25 a vine, or maybe for a couple vines. I can buy a lot of kiwis for $25!