A great article from winefolly.com about the origins of wine. All wine grape varieties are derivatives of the vinus vitifera grape and there are between 1300 and 1400 formally recognised as in use.
Of course there are around 10000 grape varieties in total, but most are used as food sources rather than wine and derive from different branches of the grape family tree.
Of the 1300 plus grape varieties used in wine just 50 make up over 80% of the wine production. Others are grown and drunk only locally and many are in danger of extinction as wine growers tear up the vines to replace them with more popular varieties.
So today’s lesson is: drink as many different grape varieties as you can or we may lose them. Always give the local wine a go.