植物进化与地质年代

“三十年河东，三十年河西”

在漫长的时间里，地球上的山川河流不断发生变化，气候也不断变化，生活在地球的生物是怎么变化的呢？

文章：Reconstructing the genome of the most recent common ancestor of flowering plants

内容：

The estimation of the timing of angiosperm evolution, based on MRCA （most recent common ancestor）genes, suggested that this group emerged 214 million years ago during the late Triassic era, before the oldest recorded fossil. 

被子植物出现于214个百万年前。