China brokered the deal between Saudi Arabia and Iran to normalize diplomatic relations. The deal was announced on March 10, 2023, after four days of talks in Beijing between top security officials from the two countries. The agreement included their affirmation of the respect for the sovereignty of states and the non-interference in internal affairs.

Denmark is the first country in the world to open an underwater graveyard for carbon dioxide (CO2). The project, called Greensand, is located in the North Sea and is expected to store up to 8 million tonnes of CO2 per year by 2030. The CO2 is injected into the seabed at a depth of 1,800 meters, where it is trapped between layers of rock and sediment. The project is a collaboration between Danish energy company Ørsted, British chemical giant Ineos, and German oil company Wintershall Dea.

The Stratospheric Observatory for Infrared Astronomy (SOFIA) was a telescope mounted on a Boeing 747 SP aircraft that used infrared light to observe the universe. It is a joint effort between NASA and the German Aerospace Center and was cancelled in 2022 due to its high cost and inadequate scientific output. For the first time, Oxygen-18 was detected in Earth’s mesosphere and lower-thermosphere using the data collected by the GREAT instrument on SOFIA observatory. This is the first time that the heavy oxygen has been detected outside a laboratory.