女性的寿命远远超过男性：在美国，女性的预期寿命在80岁左右，而男性约为75岁。 无论女性生活在哪里、赚多少钱以及其他诸多因素如何，这一现象都始终成立。对大多数其他哺乳动物而言亦是如此。

China has sent 283 contestants to compete at WorldSkills since 2010, winning the nation 93 golds, 41 silvers and 28 bronzes ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.