RT @JCDAmos: The game is afoot. @BAS_News confirmed this afternoon what I've been saying this past week - that the world's biggest #iceberg, #A23a, has come off its Taylor Column and is now once again trucking along iceberg alley. Watch the BAS tracking video. youtube.com/watch?v=1fNssnTj… 🧵 British Antarctic Survey 🐧 Mission Antarctica by @MissionAntarctica A @grttme project - Other backups: @Hallotme