If a few teeth of intermediate size and shape make “the most complete chain of human evolution,” then the evidence for human evolution must be quite modest.
The SEETI thinkers are looking for signs of intention. Even in global death, they believe they could separate natural causes from intelligent causes.
Apart from their being adorable, what many may not realize is that their motion on the sand is also amazingly efficient.
Of course, the dog is responding to words as signals, not as components of sentences.
Explosions of new life forms followed by stasis are emphatically not what evolution expects to find, but it is what paleontologists do find.