The process by which a dead animal's flesh is consumed by bacteria.
What is putrefaction?
100
A disease that would cause you to confuse the smell of a rose with that of rotting garbage.
What is dysosmia?
100
This dog "leads the pack" with 300 million olfactory receptors.
What is a bloodhound?
100
The part of an insect's body that they use to smell.
What are their antennae?
200
Two examples of foul-smelling chemicals produced when bacteria breaks down amino acids.
What are cadaverine and putrescine?
200
The usual cause of specific anosmia.
What is a faulty gene?
200
In addition to its nose, this body part also contributes to a dog's superior sense of smell.
What is the brain?
200
This animal has an outstanding sense of smell, which it uses to find its way back to the stream where it was born.
What is a salmon?
300
The foul-smelling chemical in rotten eggs. It is produced by bacteria that decomposes organic matter in swamps and sewers.
What is hydrogen sulfide?
300
Smoking, respiratory tract infections, Parkinson's disease, Alzheimer's disease, nasal polyps, and head trauma.
What are causes of anosmia?
300
This part of a dog's brain is 40 times larger than the same part in a human's brain.
What is the olfactory region of the brain?
300
Researchers at Tokyo University removed this part of the brains of lab mice, causing them to lose their fear of cats.
What is the olfactory bulb?
400
The two hideous-smelling flowers that attract insects that normally feed on decomposing animal matter.
What are the corpse flower and the titan arum?
400
Among the disadvantages of having anosmia is that food doesn't taste as good. It can also lead to these psychological disorders.
What are depression and anxiety?
400
Most dogs have about 200 million olfactory receptors, whereas humans only have this many, making us weaker "smellers".
What are 5 million olfactory receptors?
400
According to the work of two Australian researchers, these smells were discovered to ease the suffering of people experiencing physical pain.
What are sweet smells?
500
Sulfur-based chemicals produced in the scent glands of a skunk. The skunk can spray this foul-smelling chemical at attackers when threatened.
What are mercaptans?
500
If you smell chocolate chip cookies baking in the oven when they really aren't there, you have this disorder.
What is phantosmia?
500
A dog's larger olfactory membrane is almost the size of a piece of paper. Human's receptors cover a much smaller area, about the size of this.
What is a postage stamp?
500
These smells reduce stress, fatigue, anger and anxiety, while increasing alertness. This makes them useful in keeping drivers from getting into accidents.