AMES, Iowa – Methane and nitrous oxide emissions that result from human activity make the terrestrial biosphere a net contributor of greenhouse gas emissions, according to a new study published in ...

Two recent international studies are poised to change the way scientists view the crucial relationship between Earth’s climate and the carbon cycle. These reports explore the global photosynthesis and ...

It would be nearly impossible to make the Earth as inhospitable to life as the planet Mars — not that we aren’t trying. And yet, despite the red planet’s toxic soil, harmful solar radiation, and utter ...