In about 70000 to 30000 years ago, a new way of thinking and communication came up which was so-called learning revoluntion. We have no idea why this happend. but there is a commonly accepted theory that a suden gene mutation had modified how human brain was connected which made human to think and communicate in a completely new way.
夏日最后一朵玫瑰,
孤伶伶地绽放;
她所有的好伙伴,
都黯然地退去;
没有与她心心相惜的花儿,
也没有花蕾在近旁,
来影射她的粉颊,
或叹息她的叹息。