The fantastical sight before him did not particularly surprise Lü Yongchang.
Or rather, such a sight was actually perfectly normal.
Water was not uncommon in the Solar System.
Most of it simply existed in solid form because of the temperature.
The various signs in Gale Crater had already shown that liquid water had once existed on Mars.
According to previous scientific theories, Mars had an active core four billion years ago.
Thanks to that, although it could not compare to Earth, Mars's environment had not yet deteriorated into its present state.
At the very least, liquid water could probably have existed on its surface.
Lü Yongchang could not help sinking into thought.
What exactly had caused Mars to become what it was today?
"Professor, according to the latest information Captain Bai Yixuan sent back, an enormous flood occurred in Gale Crater approximately 3.9 billion years ago."
Zero's voice rang out again.
A series of images appeared in the holographic display.
"This is..." Lü Yongchang frowned deeply as he studied the enormous wave-like patterns in the images.
"Reverse dunes. Each one is approximately nine meters high, with roughly 140 meters between them." Zero quickly marked the detailed measurements of the wave-like patterns on the holographic projection. "According to the calculations, these are traces left by a massive flood."
Reverse dunes
"After this massive flood, the liquid water on Mars rapidly disappeared, leaving it in its present state."
Watching the succession of simulated images before him, Lü Yongchang nodded thoughtfully.
"A massive flood 3.9 billion years ago..." he murmured. "Zero, if I remember correctly, Mars's largest impact crater, Hellas Basin, also formed 3.9 billion years ago, didn't it?"
"Yes, Professor."
Faced with such coincidental dates, a few rather far-fetched conjectures suddenly arose in his mind.
"Zero, first simulate a Mars whose core