HumansWorld's most-spoken languages may have arisen in ancient Iran About 3 billion people speak Indo-European languages like English and Hindustani, and it seems the first such tongue was spoken south of the Caucasus mountains ¿ìè¶ÌÊÓÆµ
HumansPeople adapted to the cold and got more migraines as a result A gene variant that helps humans cope with colder climates also seems to have put people living in northerly regions at a higher risk of migraine ¿ìè¶ÌÊÓÆµ