Asakau looked through a cosmic-holoscope at a small exoplanet, 3rd from its star.

"Look at that blue one, Sanaske!"

"Ooh, that's the prettiest so far!"

"What are you two gawking at?" asked astronomy professor, Destitan.

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"Here, look, Teacher."

"Oh, that one's a marvel, isn't it? So unfortunate."

"What's unfortunate?" Asakau's eyes widened.

"You're looking at the planet's past. Wormhole micro-drones discovered it's a dead planet."

"Hit by an asteroid?"

"No, far too many craters and scorch marks. We suspect a global conflict."

"Destroying the entire planet?" Sanaske gasped.

"Indeed, we're an exception to the rule. Most advanced civilizations inevitably self-destruct."