Long suspected to be biological in origin, desert varnish is confirmed to be the product of light-gathering microbes that concentrate manganese as sunscreen.
Glacial meltwater performs unexpected and surprising roles that benefit life on earth.
A gold rush makes sense. But a copper rush? Not so much. And yet, perhaps there is more to gold than aesthetics.
The “selectivity filters” in membrane channels of living cells are able to discriminate between very similar molecules or atoms using complex mechanisms.