Smelly Stuff

Fun Facts About Smelly Stuff

• Your armpits don't actually produce body odor. The smell comes from skin bacteria breaking down odorless sweat into pungent fatty acids that smell like sulfur or onions.
• The durian fruit is so notoriously stinky that many hotels, public transit systems, and even some airlines in Southeast Asia have outright banned it. The smell of this so-called "King of Fruits" is often described as a mix of rotting onions, sewage and gym socks.
• One of stinkiest parts of the human body is the belly button. It can harbor over 2,000 different bacterial species in some people if not regularly cleaned.
• In its pure form, natural gas (mostly methane) is colorless and odorless. To prevent accidents, companies add molecules similar to hydrogen sulfide to give it that classic rotten egg smell. The odor acts as a crucial warning system, alerting us to dangerous leaks before the gas builds up to explosive levels.
• Skunk spray is so potent you can smell it at concentrations of just a few parts per billion.
• The characteristic smell of a decomposing human body peaks around 3–5 days after death. The smell is due to the bacterial breakdown of amino acids.
• Blue cheese, vomit, and sweaty feet all share the same odor-causing compounds.
• Humans dislike stinky things primarily as an evolutionary survival mechanism. Bad smells signal danger, like rotting food and disease, which could lead to sickness and death.