Human Pheromones: The Mystery of Scent and Emotion
Chapter 1

The brain's direct hotline

Chapter 2

The Proust effect and time travel

Chapter 3

The evolutionary survival guide

Chapter 4

Cultural landscapes of scent

YOUR GOAL

Master of The secret power of the sniff

Ch 3 · The evolutionary survival guide
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elorea The scientific search for human pheromones and chemical signals

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elorea The Evolutionary Survival Guide

A scent skips the detour to trigger what we feel, An ancient survival guide that makes a memory real.

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Humans traded half their smell genes just to see in color.

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elorea Bloodhounds and bears use superior nasal anatomy to navigate their environments.

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Nature's ultimate super sniffers

elorea Graphics compare the nasal passages and receptor counts of humans, bloodhounds, and bears.

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The mystery of human pheromones

elorea Isometric glass and chrome models map the human olfactory system with precise labels.

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The evolutionary survival guide
BETA

elorea Match ancient scents to dangers to learn how smell memory kept our ancestors alive.

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Fun Fact

Space smell: Astronauts describe the smell of outer space as a mix of hot metal, seared steak, and welding fumes.

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Gossip

Which super-sniffer animal power would you want?

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Quiz

Which mammal is estimated to have a sense of smell seven times stronger than a dog's?

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elorea Human sensitivity to the smell of toxic hydrogen sulfide gas.

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Quiz

What is the name of the organ used by many animals to detect pheromones, which is non-functional in humans?

10h ago

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elorea The evolutionary decline of human smell genes

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Quiz

Approximately how many olfactory receptors does a bloodhound have?

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Quiz

According to research at the Weizmann Institute, what human fluid contains chemical cues that unconsciously affect empathy?

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Quiz

Approximately how many active scent receptor genes do humans have compared to their total of 800?

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Quiz

What did evolutionary biologists find humans traded their olfactory sharpness for over millions of years?

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Quiz

How low of a concentration of hydrogen sulfide (rotten egg smell) can humans detect?

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Quiz

Why is our extreme sensitivity to the smell of rotten eggs evolutionarily beneficial?

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