Human: The World Within

Our Sense of Smell

The experience of smell starts when air molecules meet tiny little hairs in our nasal cavity. These hairs are called cilia, and they trap the incoming fumes so they can be processed.

Our Sense of Smell

1m 2s

  • React: asset-mezzanine-16x9

    React

    S1 E6 - 52m 30s

    Through the lens of a boxer, a first responder, a cell tower climber and a man with a bionic limb, go deep into the universe of the most powerful machine on earth: the human brain and the vast nervous system it controls.

  • Sense: asset-mezzanine-16x9

    Sense

    S1 E5 - 52m 33s

    Dive into the stories of a pairs figure skating team, a perfumer, a cave explorer and a musician to decipher how different ways of sensing the world all create their own vivid and unique picture.

  • Defend: asset-mezzanine-16x9

    Defend

    S1 E4 - 52m 33s

    Look at a nature survivalist, rancher twins, a doctor who survived Ebola and the recipient of a cutting-edge cancer therapy to uncover the wildly advanced biology that keeps us alive against all odds.

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