If the conductivity of copper were ten times less, wires would have to be ten times the cross-sectional area to provide the same conductivity.
It is very doubtful that any beings in the universe could develop a civilization remotely comparable with our own without the use of metals.
The importance of metals, particularly iron, and the importance of the discovery of metallurgy can hardly be exaggerated.
The ability to tame fire led to the invention of the art of cooking, and much more.
A key characteristic of life is active transport: control over what enters and exits the cell. Closer looks reveal exquisite “selectivity filters” with moving parts that make active transport work.