When chemists design new chemical reactions, one useful piece of information involves the reaction's transition state—the ...

Gang violence in Haiti has continued to further deteriorate the country's security and the crisis is reaching "a point of no ...

These points of no return are specific moments when the planet has warmed so much that certain effects become irreversible.

These points of no return are specific moments when the planet has warmed so much that certain effects become irreversible. Scientists assessed the risk of “tipping” in 16 different parts of ...

Haiti is approaching a “point of no return” as it struggles to respond to escalating gang violence, the top United Nations official in the country has said. Maria Isabel Salvador, the UN ...

Haiti, where rampant gang violence has surged in recent weeks, is approaching a "point of no return" leading to "total chaos," the UN special representative to the troubled Caribbean nation warned ...