Right now, you’re breathing in. As you inhale, air rushes past millions of sensory receptors, activating the part of your brain responsible for smell. And yet, there’s one scent you’ll never notice: the very nose you’re breathing through, because humans are smell blind to themselves.
Today, Professor Hannah Fry and VSauce’s Michael Stevens explore the mechanics of perinasal chemosensation, otherwise known as smell.
They explore how the Victorians sidelined the sense, why we’ve underestimated it ever since, and whether tuning out most of odours our noses detect is a flaw, or a powerful strategy that’s central to survival
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When Feng Zhang was in his early 30s, he used a set of genes found in bacteria called CRISPR to pioneer a new kind of gene editing tool in human cells. Today, the MIT biochemist is studying a different set of microbial genes called TIGR. And they may be the key to developing CRISPR’s successor. For this SciShow Field Trips video, we traveled to Zhang’s lab to learn about what may be the next generation of gene editing.
Hosted by: Jaida Elcock
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