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How Many Smells Can You Smell?

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate How do we smell? Great! Thanks for asking! Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter:   / drjoehanson   Follow on Instagram:   / drjoehanson   We walk through life led by our noses. Literally. Because they're on the front of our faces. The sense of smell might be one of the oldest, but how does the science of smell work? How sensitive are our noses? Why are smell-related memories so vivid? How many different smells could we possibly smell? Find out in this week's It's Okay To Be Smart! Check out this amazing essay on smell from Lewis Thomas (1980), it's a beautiful piece of science writing: http://cplab.net/heap/on-smell/ Evolution of human olfactory receptor genes: http://www.ncbi.nlm.nih.gov/pmc/artic... Pseudogenes in olfactory system: http://www.ncbi.nlm.nih.gov/pubmed/12... The nose as an emotional time machine: http://www.nytimes.com/2008/08/05/sci... Smell memories are often the most vivid: http://aeon.co/magazine/psychology/wh... Sperm olfactory receptors: http://www.ncbi.nlm.nih.gov/pubmed/16... How many smells can we smell? https://neuroecology.wordpress.com/20... http://www.sciencemag.org/content/343... You and Your Senses, starring Jiminy Cricket:    • You and your Senses of Smell and Tast...   Have an idea for an episode or an amazing science question you want answered? Leave a comment below! ----------------- It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.D Email me: itsokaytobesmart AT gmail DOT com Facebook:   / itsokaytobesmart   For more awesome science, check out: http://www.itsokaytobesmart.com Produced for PBS Digital Studios Joe Hanson - Creator/Host/Writer Joe Nicolosi - Director Amanda Fox - Producer, Spotzen Inc Kate Eads - Associate Producer Andrew Matthews - Editing/Motion Graphics Katie Graham - Director of Photography John Knudsen - Gaffer Dalton Allen - Post-Production Intern Theme music: "Ouroboros" by Kevin MacLeod Other music via APM Stock images from Shutterstock