Perfect circles of stones cover the ground in parts of Alaska and the Norwegian islands of Spitsbergen. Elsewhere in the far north, stones form other striking patterns on the ground: polygons, stripes ...

In the 1930s, the ability of green plants to form oxygen through oxidation of water -- photosynthesis -- was discovered. Since then, no other large-scale biological formation of oxygen has been found, ...

WASHINGTON -- Dramatic circles of rocks or stripes of stones precisely aligned on Arctic plains may look like navigation markers for invading aliens, but a scientist says they are just Mother Nature ...

Healthy plants start with healthy soil, and one of the key elements of quality soil is organic matter. But what exactly is ...

There’s more to dirt than just “sand” or “clay.” Soil taxonomy breaks down the layers, types, and quirks of the ground beneath our feet—and it’s weirder than you think. We Dropped a Giant Magnet in ...

This is a preview. Log in through your library . Abstract The main goal of the study was to determine the diversity of the potential nitrogen-fixing (PNF) bacteria inhabiting agricultural (A) soils ...