Carbonate minerals contain carbon dioxide, which, when present in the atmosphere, warms a planet. These minerals suggest that carbon dioxide could have previously existed in the atmosphere in larger ...

as part of what is called ‘the global carbon cycle.’ A change in any of these fluxes could have wide-ranging impacts on ecosystems and our climate. The IAEA Environment Laboratories apply nuclear and ...

NASA's Curiosity rover has uncovered evidence of a past carbon cycle on Mars. This breakthrough provides scientists with new ...

Our concept of a 'boundless carbon cycle' would encourage policymakers to better appreciate the couplings between land and water and between the hydrological cycle and the carbon cycle.

NASA’s Curiosity rover discovered siderite in Gale Crater. This shows Mars had a partial carbon cycle, storing and releasing carbon dioxide.

Tutolo led a new study of rock samples collected by the Curiosity rover that might have answered this question. The mystery ...

For siderite to form, you need liquid water, carbon dioxide, and the right chemical conditions ... some carbon dioxide back to the atmosphere, completing part of the carbon cycle. With this in mind, ...

Spray half the samples with water; leave the rest dry ... and nitrogen to the atmosphere and soil for reuse. A balanced carbon cycle is essential. Carbon is a major component in carbohydrates ...

Billions of years ago, Mars was warm, wet, and capable of sustaining liquid water on its surface. Scientists have long believed the Red Planet once had a dense atmosphere rich in carbon dioxide (CO₂), ...

Leaves are responsible for the exchange of carbon dioxide and water vapour between plants and the atmosphere, and therefore play a key role in both the carbon and hydrological cycles. However, when ...

(A) Photosynthesis in land plants fixes atmospheric CO2 (inorganic carbon) as organic carbon, which is either stored as plant biomass or in soil, or is decomposed back to CO2 through plant and ...