US middle class in 'lost decade' as income falls アメリカの中流家庭も、出費を抑える生活を続けており、「10年前と比べて生活が苦しい」というアンケート結果が出てました。アメリカ全体で経済格差が拡大し、中流家庭の収入が上流家庭に抑え込まれている…

An Icelandic company found the number of genetic mutations in children was directly related to the age of their father when they were conceived... The reason that men rather than women drive the mutation rate is that women are born with al…