Why so many species have tails and humans are one of the few that don’t
We do. Well, kind of. A human embryo has a tail.
The Short Answer
We do. Well, kind of. A human embryo has a tail. They're about one-sixth the size of the body. But, fortunately (or unfortunately, I guess in your case) we have evolved to the point where we no longer need one. And so, it gets absorbed in our bodies as we grow and is completely gone by the time the embryo has developed into a fetus. All that is left when we're born is the *coccyx*, or tail bone. Most of the time. There are some people who are born with remnants of this tail. You can google 'human tail' if you want to see some examples, but they're not exactly pretty.
Analysis
Key Concepts: Tail, embryo, they're
This explanation focuses on tail, embryo, they're and spans 111 words across 10 sentences. At 54% above the average Biology explanation (72 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.
What This Answer Covers
The explanation opens with: “We do.” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 10 connected points.
How This Compares in Biology
Ranked #96 of 500 Biology questions by answer depth (top 20%). This places it in the comprehensive tier — the top quarter of most thoroughly answered questions. Questions at this depth typically involve multi-faceted topics requiring nuanced explanation.
Frequently Asked Questions
Is there a simple explanation for why why so many species have tails and humans are one of the few that don't?
We do. Well, kind of. A human embryo has a tail. They're about one-sixth the size of the body. But, fortunately (or unfortunately, I guess in your case) we have evolved to the point where we no longer need one. And so, it gets absorbed in our bodies…
How detailed is this explanation compared to similar Biology questions?
This is one of the most thorough answer at 111 words, ranked #96 of 500 Biology questions by depth. The key concepts covered are tail, embryo, they're.
What approach does this answer take to explain why so many species have tails and humans are one of the few?
The explanation uses concrete examples and contrasting perspectives across 111 words. It is categorized under Biology and addresses the question through 2 analytical lenses.