From left, clockwise: Colourised transmission electron micrograph of SARS-CoV-2 virions with visible coronae, the virus that causes COVID-19, which in 2020 became a pandemic that has so far dominated the decade; A Russian BMP-3 near Mariupol destroyed during the 2022 Russian invasion of Ukraine, part of the greater Russo-Ukrainian War; Smartphones saw foldable technology being incorporated in the early 2020s, as well as 5G cellular networks; In addition to many private and public spaceflight advancements, the James Webb Space Telescope was launched in 2021; Taliban fighters in Kabul on a captured Humvee following the 2021 fall of Kabul at the end of the War in Afghanistan.