Emu Field, also called Emu Junction or simply Emu, is one of the most remote places ever chosen for a nuclear test. The surveyor Len Beadell pegged the site in 1952 on a hard desert clay-pan, and a temporary village and airstrip were thrown up to support the trials, all of it serviced from the distant Woomera range. Operation Totem consisted of two atomic detonations, both mounted on steel towers. Totem One fired on 15 October 1953 with a yield of about nine kilotons; Totem Two followed on 27 October at roughly seven kilotons, comparable in force to the weapons dropped on Japan less than a decade before. A separate series of smaller conventional experiments, codenamed Kittens, was also run here to test the bombs' neutron triggers. Then the scientists left, and the desert was meant to forget.

It did not go as planned. The radioactive cloud from Totem One failed to climb and disperse as the meteorologists had assured everyone it would. Low cloud and shifting wind dragged the fallout back toward the ground, and it travelled northeast across the continent as a dense, dark, greasy plume, the black mist remembered by those who lived through it. It rolled over Anangu families, Pitjantjatjara and Yankunytjatjara people, living and travelling on their own country around Wallatinna and Welbourn Hill. They had been given no warning and no protection. People vomited, broke out in rashes, went down with sore eyes and a flu-like sickness. Some, the very old and the very young, died. The tests had been conducted on these peoples' traditional lands without their consent and without meaningful consultation, secrecy and convenience placed ahead of the lives downwind. For decades the official position was that no one had been harmed.

Yami Lester, a Yankunytjatjara man, did not stay silent. Blind from boyhood, he became one of the most determined voices calling for the truth about what the bombs had done, his testimony helping to force the Royal Commission that finally examined the tests in the 1980s. The country itself bears a more durable witness. Because the first cloud refused to disperse, Emu was judged too contaminated for further use, and the search for cleaner ground led the British to Maralinga, where more atomic tests followed in 1956. At the ground-zero points stone monuments now stand, reachable only by the long and lonely Anne Beadell Highway and only with written permission. Around them the sand is still scarred with concentric blast rings and patches of glassy, vitrified earth, fused in an instant by a heat the desert had never known.

For most of its life Emu Field was the test the public was allowed to forget, overshadowed by Maralinga and tucked away in country almost no one could reach. That is changing. In 2022 the historian Elizabeth Tynan published a full account, fittingly titled The Secret of Emu Field, drawing the place and its consequences back into the light. The clay-pan today is silent: the village gone, the airstrip abandoned to the scrub, the only structures the obelisks at the two craters. But for the Anangu families who carry the black mist in their memories and in their bodies, Emu Field was never secret, and never forgotten. It was the morning the sky turned dark over home.