Twenty-two years had passed since humanity had finally given Elena Varga's impossible anomalies a name.
Temporal Drift.
In those twenty-two years, the question facing temporal science had changed. Scientists no longer asked whether history could move. They knew that it could. Now they wanted to know why. Professor Amara Chen had devoted most of her professional life to answering that question.
She had been there in 2751 when Temporal Drift was formally classified. She had watched decades of observations become a recognised branch of science. She had seen Elena Varga's surviving work transformed from an historical curiosity into the foundation of an entirely new scientific discipline.
But none of it had answered the most important question.
What had started it?
For years, there had seemed to be no answer. Drift Events occurred in different centuries, in different countries and under completely different circumstances. Some affected people. Others affected events. Some produced consequences so minor that they were detectable only by temporal instrumentation. There appeared to be no common historical cause.
Then, in 2764, somebody had stopped looking at the individual events. Instead, they had looked at the damage itself. The first results had been unexpected. Temporal instability was not uniform across history. It became weaker. The further backwards they measured, the less pronounced it became. That discovery had changed everything. If Temporal Drift were an inherent property of reality, there should have been no beginning.
But there was.
Somewhere in humanity's past, stable temporal continuity had become damaged. For seven years, researchers followed that trail backwards. Century by century. Decade by decade. Year by year.
Until, in 2771, it led them to 1945.
And then to a desert in New Mexico.
Trinity.
The first detonation of a nuclear weapon.
For a brief time, they thought they had solved it.
They were wrong.
Amara stood behind the observation barrier of Temporal Analysis Laboratory One, looking at the enormous reconstruction suspended beyond the glass. Three points of light floated against a representation of twentieth-century Earth.
The first was in New Mexico.
16 JULY 1945
The second appeared over Japan.
6 AUGUST 1945
The third followed three days later.
9 AUGUST 1945
Dr Elias Okafor stood beside her.
“It has finished.”
Amara did not look away from the display.
“And?”
Elias hesitated.
That was enough to make her turn towards him.
“Well?”
“Trinity isn't the cause.”
Amara frowned.
“We've confirmed the structural disturbance.”
“Yes”
“We've reproduced the initial damage signature.”
“Yes”
“Then how can it not be the cause?”
“Because it was healing.”
Amara stared at him.
“What?”
Elias transferred the results to the observation glass. The first graph showed a sudden disruption on 16 July 1945. There was no mistaking it. The temporal structure around the event had distorted violently. For the first time in their reconstruction, history itself had suffered measurable structural damage. Then the line began moving back towards stability.
Amara leaned closer.
“How quickly?”
“Faster than we expected.”
“So if nothing else had happened...”
“It would have recovered.”
She looked at him.
“Completely?”
“As far as the model can determine.”
That made no sense. Every historical trace they had followed led towards Trinity. For two years, they had treated it as the originating catastrophe. And yet the latest reconstruction showed that the damage should have disappeared naturally.
“Then why didn't it?”
Elias said nothing. Instead, he brought up the second graph.
6 AUGUST 1945 — HIROSHIMA
Amara watched the line. The temporal structure had been recovering. Slowly. Steadily. Then Hiroshima occurred. The recovering structure destabilised again. Not in precisely the same way as Trinity. The existing damage was disturbed before it had finished healing. The recovery curve collapsed.
Amara moved closer to the glass.
“Oh.”
Elias nodded.
“That was approximately my reaction.”
She barely heard him.
“Run Nagasaki.”
“Already done.”
The third graph appeared.
9 AUGUST 1945 — NAGASAKI
Another detonation. Another disturbance. But this time, the underlying temporal structure had already been damaged twice within little more than three weeks. There had been no opportunity for recovery. The third event struck an already unstable system. The graph changed. The recovery curve disappeared.
Amara stared at it.
“Run the counterfactual.”
Elias brought up another simulation. Trinity alone. Damage. Instability. Recovery. Eventually, the line returned to its original state. Another simulation appeared. Trinity followed by Hiroshima. Much greater instability. A far longer recovery. But recovery remained theoretically possible. Then the complete historical sequence appeared.
Trinity.
Hiroshima.
Nagasaki.
The line never returned to normal. For several seconds, neither scientist spoke. Amara finally understood what they had been looking at for all these years.
“It wasn't one event.”
“No.”
“It was the sequence.”
“Yes.”
She looked again at the dates.
16 July.
6 August.
9 August.
Three detonations within approximately three and a half weeks. The first had damaged temporal reality. The second had interrupted its recovery. The third had compounded damage that had never had time to heal. Amara felt suddenly cold.
“Have you had this independently verified?”
“Luna confirmed it six hours ago. Mars finished forty minutes ago. Tycho is still running its reconstruction.”
“And?”
“All results agree within tolerance.”
Amara turned back towards the representation of Earth. For more than sixty years, beginning with Elena Varga's first impossible measurement in 2712, scientists had been studying the symptoms. Now they had found the wound. By that afternoon, the senior temporal research council had assembled. Nobody used the word discovery lightly anymore.
