Just like hamsters, humans living in areas with long, dark winters have more boys: 51.3% of babies born in temperate and subarctic regions are male, compared with 51.1% in the tropics.

• 就像仓鼠一样，那些生活在有着漫长而黑暗的冬天的地区的人们有更多的男生： 51.；3 %25出生于温带和亚寒带地区的婴儿是男性，而在热带地区仅为51