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An Immense World summary

Ed Yong

How Animal Senses Reveal the Hidden Realms Around Us

4.5 (119 ratings)
16 mins

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An Immense World by Ed Yong explores the hidden beauty of the microbial world, revealing how these tiny creatures affect every aspect of our lives from our health to the environment. The book offers a fresh perspective on the importance of microbes and their role in shaping our world.

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    An Immense World
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    Seeing the world: Color and echoes

    Most of human society is built largely around our sense of sight. How we dress, how we get around, how we consume information . . . the list is endless. And, to be fair, humans do have a sharp sense of sight – at least compared to much of the animal world. Humans are trichromats, which means we have three different cones in our eyes that specialize in detecting certain wavelengths of light. 

    By contrast, dogs and horses only have two. Dogs mostly see shades of gray, yellow, and blue as a result. Many “color-blind” people are also missing one of the three cones humans usually have, and so they see a smaller range of colors. Those of us who use three cones to see color can get an idea of how dichromats see the world using picture editing software. But we can’t imagine what seeing with four cones would be like. 

    Animals with more than three cones perceive more colors than we can even comprehend. But they can’t compare those colors, which is how sighted humans build an understanding of what the world looks like around them. 

    Instead, for animals whose brains don’t compare colors, different wavelengths of light merely spark instinctive responses. Daphnia water fleas only see flashes of color, not full landscapes. An ultraviolet light indicates sunshine, so they swim away. They swim toward the colors green and yellow because those wavelengths indicate food. These fleas interpret wavelengths of light as just another stimulus prompting their instinctual behaviors. They simply don’t experience the sense of sight the same way we do. 

    Another way of “seeing” the world involves a different sense: echolocation. Animals like bats and dolphins use echolocation to build visual pictures of the world around them. They produce pulses of ultrasonic sound, then listen to the echoes returned from objects around them. They vary the length and frequency of these sounds to build clear pictures of their surroundings. 

    In fact, bats are so good at this that they can snatch flying insects out of the air and navigate through a maze of hanging chains. Dolphins can recognize two-dimensional pictures of items they’ve previously investigated using sonar. 

    But this incredible ability isn’t just limited to the animals around us – humans can learn to echolocate too. 

    Daniel Kish had his eyes removed at the age of 13 months in response to a particularly aggressive form of eye cancer. As he grew up, he started exploring the world using tongue clicks. It took him awhile to be able to put words to what he was doing – echolocating. Now, after decades of practice, Kish can take a walk around the block and tell where houses end, where a yard is versus a driveway, and where trees stand. He ducks to avoid branches of trees overhanging the sidewalk – branches he senses using echolocation. 

    By watching dolphins and bats echolocate, we can determine a lot about how the sense works and what its limitations are. But Kish can tell us how it works for him. Because his sonar is lower in frequency than bats’, the resolution of what he senses is a little blurry. Edges aren’t crisp, and objects in front of large backgrounds – like a person standing right against a wall, or a small object on the ground – can be hard to sense. So he mostly defines objects by their density and texture when using echolocation.

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    What is An Immense World about?

    An Immense World (2022) explores the sensory worlds of animals, highlighting how they differ from the human experience. Tracing sight, sound, touch, and more, it shares the various ways animals sense our world – and the extra information they glean with the help of their specialized senses.

    An Immense World Review

    An Immense World (2021) is a captivating exploration of the hidden wonders of the microbial world and why it matters to our daily lives. Here's why this book is worth reading:

    • With a mix of mind-blowing facts and intriguing stories, it reveals the incredible diversity and complexity of the microscopic organisms that surround us.
    • By highlighting the interconnectedness between microbiomes and our health, the book provides a fresh perspective on how our bodies and the world around us function.
    • Through engaging narratives and thought-provoking insights, it challenges our understanding of what it means to be human and prompts us to reflect on the impact of these invisible beings.

    Who should read An Immense World?

    • People interested in how animals make sense of their environment
    • Animal lovers
    • Anyone curious about the natural world

    About the Author

    Ed Yong is a British science writer at the Atlantic. He’s written for numerous publications, received a Pulitzer Prize, and published two books: I Contain Multitudes and An Immense World.

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    An Immense World FAQs 

    What is the main message of An Immense World?

    Discover the astonishing complexity and interconnectedness of the natural world in An Immense World.

    How long does it take to read An Immense World?

    Reading time for An Immense World varies, but the Blinkist summary can be read in just 15 minutes.

    Is An Immense World a good book? Is it worth reading?

    With its captivating exploration of the wonders of nature, An Immense World is definitely worth reading.

    Who is the author of An Immense World?

    The author of An Immense World is Ed Yong.

    What to read after An Immense World?

    If you're wondering what to read next after An Immense World, here are some recommendations we suggest:
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