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
LifeOxygen may have helped complex life arise a billion years early Earth’s air suddenly got a lot more oxygen around 1.6 billion years ago and that could have triggered the evolution of large multicellular organisms ¿ìè¶ÌÊÓÆµ