Composite metal foams (CMFs) are little-known materials that are beginning to show some big promise. Last year we saw researchers adapt these lightweight materials to stop various forms of radiation ...

The spheres inside the composite metal foam absorb the energy of a bullet. (North Carolina State University) Foam might not seem a likely way to stop a high-speed bullet, but a North Carolina ...

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Please don’t ever do this at home. Or do this anywhere, really. Mixing bullets with molten aluminum creates a helluva explosion—but it sprays the hot liquid metal everywhere, and that’s just a ...