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why do cats have to smell everything? Why can’t they just look at the things?

Dr. Aris Thorne
Dr. Aris Thorne
Senior Science Editor · Mar 24, 2026 · Updated Apr 13, 2026

ELI5 : Cats have really poor vision for details, everything they look at is fuzzy and doesn't have as many colours as we have. Their eyes are however good at tracking motion (think T-Rex from the first Jurassic Park), which is why they can chase things so well. So when things are just being lazy …

112
Words

1 min
Read Time

#85
of 500 in Human Body

+62%
vs Category Avg

The Short Answer

ELI5 : Cats have really poor vision for details, everything they look at is fuzzy and doesn't have as many colours as we have. Their eyes are however good at tracking motion (think T-Rex from the first Jurassic Park), which is why they can chase things so well. So when things are just being lazy & relaxed, a cat can survey its territory using it's awesome nose to find out if anything has been nearby recently, if there are any little mice to eat or if another cat has been trespassing on it's territory. They also have awesome hearing which you will notice every time you try to open a can of tuna.

Analysis

Key Concepts: Territory, it's, awesome

This explanation focuses on territory, it's, awesome and spans 112 words across 4 sentences. At 62% above the average Human Body explanation (69 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: “ELI5 : Cats have really poor vision for details, everything they look at is fuzzy and doesn't have as many colours as we” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 4 connected points.

How This Compares in Human Body

Ranked #85 of 500 Human Body questions by answer depth (top 18%). 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 cats have to smell everything? why can't they just look at the things?

ELI5 : Cats have really poor vision for details, everything they look at is fuzzy and doesn't have as many colours as we have. Their eyes are however good at tracking motion (think T-Rex from the first Jurassic Park), which is why they can chase…

How detailed is this explanation compared to similar Human Body questions?

This is one of the most thorough answer at 112 words, ranked #85 of 500 Human Body questions by depth. The key concepts covered are territory, it's, awesome.

What approach does this answer take to explain cats have to smell everything? why can't they just look at t?

The explanation uses contrasting perspectives across 112 words. It is categorized under Human Body and addresses the question through 1 analytical lens.