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Short-sightedness is reaching epidemic proportions. Some scientists think they have found a reason why. East Asia has been gripped by an unprecedented rise in myopia. Today, up to 90% of Chinese teenagers and young adults are short-sighted. Other parts of the world have also seen a dramatic increase in the condition, which now affects around half of young adults in the USA and Europe. By some estimates, the world may count nearly half a billion of blind people in 2050. In severe cases, the deformation of the eyeball increases the risk of retinal detachment, cataracts, glaucoma and even blindness. About one-fifth of university-aged people in East Asia now have this extreme form of myopia, and half of them are expected to develop irreversible vision loss. This threat has prompted a rise in research to try to understand the causes of the disorder — and scientists are beginning to find answers…
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Por anos, os cientistas sabem da existência de outro cérebro dentro de nossos corpos. Nosso estômago funciona de forma totalmente independente e faz muito mais do que apenas digestão. Ele reina sobre uma colônia espetacular de cem bilhões de bactérias que têm um forte impacto em nossas personalidades. Algumas doenças do cérebro, como a doença de Parkinson, podem derivar da degeneração dos neurônios intestinais.
