Nature’s Depths

Walking through nature with John Palka, a neuroscientist who loves plants and ponders big questions

Luminary Loppet ice xylophone

A World of Molecules


Both living things and the non-living world consist of molecules. The molecules that make up each one of us are largely the same as those that make up every other person and animal on the planet. Molecules make up everything in the world of our experience.

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Milkweed seed pod opening, Prairie Oaks Institute

In the Autumn of the Year


“Autumn is a season of great beauty, but it is also a season of decline: the days grow shorter, the light is suffused, and summer’s abundance decays toward winter’s death. Faced with this inevitable winter, what does nature do in autumn? She scatters the seeds that will bring new growth in the spring—she scatters them with amazing abandon.”

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Bald eagle eye close up

Seeing with Different Eyes


Sensitivity to light is so universally useful that many kinds of animals have evolved eyes. The structure of the eyes of diverse animals, however, varies considerably, and with this variation come differences in what information about the world the eyes can capture and convey to the brain. Thus, the role of vision in the lives of different animals cannot be assumed to be similar to our own experience. Let’s look at some examples.

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