Iceberg A68a has been on a slow journey toward potential disaster. The huge ice mass, which broke from the Antarctic’s Larsen C ice shelf in July 2017, slid toward the open ocean for over two years until it hit the powerful Circumpolar Current that circles the continent. That propelled the berg northeast through what scientists call “iceberg alley”, and it’s now headed straight for South Georgia Island, and could hit the remote world in the southern Atlantic teeming with wildlife within days. At 4,200 square kilometres, the berg is bigger than Singapore or Luxembourg. “There’s nothing that’s really been that large before in scientific history that we’ve seen coming up to South Georgia,” said Geraint Tarling, a biological oceanographer with the British Antarctic Survey.