On December 21
On December 21, the Human Saga records one pivotal event: SpaceX lands an orbital rocket booster, opening the reusable-rocket era (2015).
On this day
On 21 December 2015, the private American company SpaceX landed the first stage of its Falcon 9 rocket vertically at Cape Canaveral, Florida, after the booster had helped deliver eleven Orbcomm communications satellites to orbit.
Also this week in history (Dec 18 – Dec 24)
On 18 December 1978, the Third Plenary Session of the 11th Central Committee of the Chinese Communist Party convened in Beijing and resolved to shift the focus of the Party and state from class struggle to economic construction, launching…
On 18 December 1979 the United Nations General Assembly adopted the Convention on the Elimination of All Forms of Discrimination against Women (CEDAW), an international treaty often described as an international bill of rights for women.
In 2025, renewable energy surpassed coal as the largest single source of electricity generation worldwide for the first time, a structural milestone in the global energy transition.