历史上的今天 · 10月31日
1517
马丁·路德张贴《九十五条论纲》，宗教改革拉开序幕
Martin Luther posts his Ninety-five Theses in Wittenberg, sparking the Protestant Reformation.
1864
内华达成为美国第36个州
Nevada is admitted as the 36th U.S. state.
1941
拉什莫尔山四总统巨像历时14年完工
Mount Rushmore is completed after 14 years of carving.
1984
印度总理英迪拉·甘地遇刺身亡
Indian prime minister Indira Gandhi is assassinated by her own bodyguards.
2011
联合国象征性宣布全球人口达到70亿
The United Nations marks the world's population reaching seven billion.
资料来源：维基百科「历史上的今天」（CC BY-SA），GSM 整理 · Source: Wikipedia "On this day" (CC BY-SA), curated by GSM