Pick up a button mushroom from the supermarket and it squishes easily between your fingers. Snap a woody bracket mushroom off a tree trunk and you’ll struggle to break it. Both extremes grow from the same microscopic building blocks: hyphae – hair-thin tubes made mostly of the natural polymer chitin, a tough compound also found in crab shells.

As those tubes branch and weave, they form a lightweight but surprisingly strong network called mycelium. Engineers are beginning to investigate this network for use in eco-friendly materials.

Yet even within a single mushroom family, the strength of a mycelium network can vary widely. Scientists have long suspected that how the hyphae are arranged – not just what they’re made of – holds the key to understanding, and ultimately controlling, their strength. But until recently, measurements that directly link microscopic arrangement to macroscopic strength have been scarce.

I’m a mechanical engineering Ph.D. student at Binghamton University who studies bio-inspired structures. In our latest research, my colleagues and I asked a simple question: Can we tune the strength of a mushroomlike material just by changing the angle of its filaments, without adding any tougher ingredients? The answer, it turns out, is yes.

In our study, my team compared two familiar fungi. The first was the

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