7.5.1 Distributions of organism

（貌似）哥伦布发现两边大陆物种很像

7.5.2 Fossils (the most direct evidence)

$C_{14}$衰变程度可以用来判断年代

7.5.3 Anatomical解刨学

1. Vestigial 退化 eg.鲸鱼后肢，企鹅不会飞
2. Analogously similar structure eg.鸟的翅膀骨架
3. Convergent evolution 趋同进化：different places, same trait
4. Homologous structure 同源结构: 同源但是功能不同 eg.猫和人的手臂

7.5.4 Molecular

1. DNA & RNA composition, codon system
2. Similar structures
3. Similar protein structures
4. Similar processes like glycolysis