Microorganisms are all around us, with an amazing diversity of adaptations. They were the first life on Earth, and their relatively recent discovery in extreme environments—like hot springs, ocean vents, and polar ice—illustrates how tenaciously they've evolved and survived. Microbiology gives us insights into evolution, disease, and even the mechanisms of our own cells.

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Have you ever seen a real virus? Probably not – they are too tiny to see. But how big or small are viruses really? You can make a scale model to find out and compare the size of a virus to many other small objects. How much bigger do you think a pencil dot is compared to a coronavirus? Written instructions as well as the Scaling Chart and the Units and Conversion Table are available on our website at https://www.sciencebuddies.org/stem-activities/virus-scale-model?from=YouTube. Science Buddies…
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