Last week, Iran notified China, France, Germany, Russia and the UK of its decision to halt some commitments under the 2015 nuclear deal, a year after the US unilaterally withdrew from the accord and re-imposed sanctions.
Astronomers across the globe will hold "six major press conferences" simultaneously on Wednesday to announce the first results of the Event Horizon Telescope (EHT).
South Korea's parliament on Wednesday passed a set of bills to fight air pollution that has blanketed parts of the country in recent years, with one bill designating the problem a ''social disaster''.
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