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The 64-year-old presenter, who's popularly known as Bill Nye the Science Guy, made a series of two TIkTok videos to demonstrate why we should be using face masks, urging people to wear one when they're out in public.
Testing out several different types of face covering, ranging from a chunky knit scarf through to a double-layer homemade mask, Nye explained to social media users about the effectiveness of each in preventing the spread of particles in the air.
Having lit a candle and placed it in front of him, he went through each material and attempted to blow the flame out, in turn creating a strong visual explanation about how our breath - and germs - can travel.
Nye, who has 6.4 million followers on TikTok, said: "Face masks... prevent particles from my respiratory system from getting into the air and getting into your respiratory system."
Perhaps unsurprisingly, Nye's scarf proved to be fairly ineffective as a covering, as he blew the candle out with ease.
"It can block the movement of air, but only to a certain extent," he said.
A double-layered face mask, however, proved much more productive, as the flame remained despite Nye's best efforts to distinguish it with a few big puffs.
That mask, he said, was made out of two layers of fabric, with pipe cleaners inserted inside so you can mould it to the shape of your face - meaning it's something anyone can make easily and cheaply at home.
In his second video, Nye continued: "The reason we want you to wear a mask is to protect you, sure. But the main reason we want you to wear a mask is to protect me from you, and the particles from your respiratory system from getting into my respiratory system."
Growing louder and more emphatic to really drive his point home, Nye said to the camera: Everybody, this is a matter literally of life and death. And when I use the word 'literally', I mean literally a matter of life and death."
He concluded: "So when you're out in public, PLEASE wear a mask."
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