Under the original Artemis architecture, NASA planned on multiple versions of the SLS rocket, ranging from the "Block 1" vehicle currently in use to a more powerful EUS-equipped Block 1B and eventually an even bigger Block 2 model using advanced solid rocket boosters. The latter two versions required use of a taller mobile launch gantry, already well under construction at the Kennedy Space Center.
BAS stations monitor different aspects of wildlife and the environment. Halley VI is focused on space and atmospheric data, as well as studying the Brunt Ice Shelf on which it's located close to the coast, and the hole in the Earth's ozone layer.
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This lack of data sharing has reportedly been a bone of contention in trade talks with the US. Google argued that it was unfairly handicapped by the restrictions that allowed local apps like Naver to thrive.