Five of Earth’s vital systems are close to a point of irreversible change, warns a new report released by a global network of scientists ahead of the upcoming U.N. climate change conference in Brazil.

Add Yahoo as a preferred source to see more of our stories on Google. Meltwater runs across the Greenland ice sheet in rivers. The ice sheet is already losing mass and could soon reach a tipping point ...

The following conversation with Tim Lenton, the founding director of the Global Systems Institute at the University of Exeter and lead author of the 2008 paper that formally introduced the idea of ...

One of the most pressing questions facing climate scientists, and the world at large, is whether human-caused global warming could trigger changes in the climate system that will radically reshape the ...

The Amazon’s “tipping point” refers to the transition of the rainforest into a drier, savanna ecosystem. The rainforest’s ecological balance depends on the transport and recycling of moisture, but ...

Thanks to the dire condition of the Earth's coral reefs, the planet has now reached its first tipping point for human-caused climate change, according to a new report by scientists in Europe. The ...

Scientists are increasingly convinced that the Atlantic’s great conveyor belt of heat and salt is edging toward a critical threshold, one that could reshape weather, food security and sea levels for ...