සිලොනේසියන් කියන දූපතෙත් ඉන්නවා ඇදිවත වත් නැති නොමේරු කොට්ටාසයක්
විද්යාත්මක නාමය - Biceylonisapien
Should be Biceyloniaimbecillus

PS: Whether a group remains isolated or not - evolution moves on. But with the advances of Science & Medicine we are now facing fewer selection pressures.
It is selection pressure that drives natural selection (‘survival of the fittest’).
But there's proof from our DNA that evolution does take place which are characterised by SNPs (Single Nucleotide Polymorphisms)
One such example is the gene that's resonsible for Lactase production. This happened about 10,000 years ago almost at the same time that domestication of cows took place. Lactase is the enzyme that does the digestion of Lactose - the sugar in Milk. Now our Lactase gene stays ON and we consider Lactose intolerance as a disease. This wasn't really the case.
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