Glacial meltwater performs unexpected and surprising roles that benefit life on earth.
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.
Can we explain human technology merely by supernova explosions and blind chance? In rare earth elements, we find hints of a better explanation.
Let’s have a look at an example: nerve cells and their action potential signals.