Kyle watched something resembling a neon octopus swim beneath the survey craft.

“This planet’s a mystery,” he said.  “Something left a footprint so huge an ocean formed inside it.  From orbit the print looks bipedal in origin but there’s only one of them.  And we know almost nothing about the creature that made it.”

“We know it had a leg span of about four-hundred thousand kilometers,” said Greg, staring upward.

“What?  Nothing could be that—”  Kyle followed Greg’s gaze then stopped mid-sentence.  “Oh.”

He got on his transmitter.

“Command, this is Johannessen.  We found the other footprint.  It’s on the moon.”