In Hanna Lee's childhood South Korea, afforestation was a happy success story. As a climate researcher, she has realized that planting trees is not always good.

Highly probable ocean tipping points need to be taken equally seriously as potential singular catastrophic climatic tipping points, write scientists and stakeholders in a new PNAS research perspective.

Big data demand new tools. To find out how much CO₂ the Atlantic will take up in the future, researchers pick up an old one. The legacy of Mendel.