Keyword Analysis & Research: why don't humans have tails

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why don't humans have tails	0.94	0.5	7370	22	27
why	0.51	1	9149	22	3
don't	1.72	0.3	2018	41	5
humans	0.14	0.3	876	35	6
have	0.98	1	574	22	4
tails	0.1	0.3	9419	14	5

Keyword	CPC	PCC	Volume	Score
why don't humans have tails	0.55	0.9	9368	15