According to this video, how is the Palmaris Longus currently most useful?

What does the word "vestigial" mean with regard to the physical traits described in this video?

In replacing tendons during reconstructive or cosmetic surgery

In helping humans grip things more tightly

Why do we sometimes get goosebumps when we listen to music?

Because a surprising, intense emotion can trigger an adrenaline rus

Because, for our mammalian ancestors, raising their fur could increase their size, making them look more threatening

because our mammalian ancestors considered surprise to be a threat

all of the above

What are tailbones made out of?

Vestigial tendons

3 to 5 fused vertebrae

3 to 5 fused muscle anchors

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