Metal foam seems like an impossible material but let me assure you that this substance actually exists. Not to be confused with steel wool or a heavy duty kitchen sponge, metal foam is a material that can absorb large impacts with very little damage.
North Carolina State University's Dr. Afsaneh Rabiei has discovered the strongest form of this damage resistant material. This strong metal foam has the ability to compress up to 80% of its initial shape, yet retain its original size.
This innovation is especially exciting to automakers since it can protect the drivers and passengers far better than before.
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By: Luisa Amanda Gomes - Published: Feb 1, 2010 • References: livescience