It's in our bodies. It's in trees. It's in the oceans. There is, in fact, a carbon cycle as it moves around, and carbon has been moving in an unusual way. NPR's Christopher Joyce reports.

If Mars had a stable carbon cycle, it could have supported microbial life in its ancient lakes and rivers. Scientists believe that understanding how Mars lost its atmosphere could help predict ...

Giant icebergs could be responsible for the processes that absorb up to 20% of the carbon in the Southern Ocean's carbon cycle, a study suggests. Researchers say meltwater from these vast blocks ...