THERE has been a controversy in the literature concerning ferrous iron in soils on three points, namely: (1) Is ferrous iron present in large quantities in ordinary healthy soils ? (2) Can soil ...

The recent discovery of a key mineral has reshaped our scientific understanding of what Mars looked like in the past.

As of the midday close, domestic base metals generally declined, with SHFE copper slightly up by 0.08%, SHFE aluminum down by 0.27%, SHFE zinc down by 0.62%, SHFE lead and SHFE tin slightly down, and ...

But while lifeless during that time, the planet was already covered by vast oceans dotted with hydrothermal vent systems that released large amounts of ferrous iron into the water. The earliest ...

The deep blue sea may not have always been so blue. A new study suggests that the Earth's oceans may have changed color over time and could change again in the future, depending on the chemical ...

Rivers subsequently carried this dissolved iron into the seas, where it was joined by additional ferrous iron ejected from volcanic vents on the ocean floor. These iron-rich conditions triggered ...