"Hey, Alan," Lizzie said. "Tell me something."
"Yes?"
"What are you wearing?"
"Uh ... switching over to private channel."
"Make that a three-way," Consuelo said.
Ballooning, Lizzie decided, was the best way there was of getting around. Moving with the gentle winds, there was no sound at all. And the view was great!
People talked a lot about the "murky orange atmosphere" of Titan, but your eyes adjusted. Turn up the gain on your helmet, and the white mountains of ice were _dazzling!_ The methane streams carved cryptic runes into the heights. Then, at the tholin-line, white turned to a rich palette of oranges, reds, and yellows. There was a lot going on down there -- more than she'd be able to learn in a hundred visits.
The plains were superficially duller, but they had their charms as well. Sure, the atmosphere was so dense that refracted light made the horizon curve upward to either side. But you got used to it. The black swirls and cryptic red tracery of unknown processes on the land below never grew tiring.
On the horizon, she saw the dark arm of Titan's narrow sea. If that was what it was. Lake Erie was larger, but the spin doctors back home had argued that since Titan was so much smaller than Earth, _relatively_ it qualified as a sea. Lizzie had her own opinion, but she knew when to keep her mouth shut.
Consuelo was there now. Lizzie switched her visor over to the live feed. Time to catch the show.
"I can't believe I'm finally here," Consuelo said. She let the shrink-wrapped fish slide from her shoulder down to the ground. "Five kilometers doesn't seem like very far when you're coming down from orbit -- just enough to leave a margin for error so the lander doesn't come down in the sea. But when you have to _walk_ that distance, through tarry, sticky tholin ... well, it's one heck of a slog."
"Consuelo, can you tell us what it's like there?" Alan asked.
"I'm crossing the beach. Now I'm at the edge of the sea." She knelt, dipped a hand into it. "It's got the consistency of a Slushy. Are you familiar with that drink? Lots of shaved ice sort of half-melted in a cup with flavored syrup. What we've got here is almost certainly a methane-ammonia mix; we'll know for sure after we get a sample to a laboratory. Here's an early indicator, though. It's dissolving the tholin off my glove." She stood.
"Can you describe the beach?"
"Yeah. It's white. Granular. I can kick it with my boot. Ice sand for sure. Do you want me to collect samples first or release the fish?"
"Release the fish," Lizzie said, almost simultaneously with Alan's "Your call."
"Okay, then." Consuelo carefully cleaned both of her suit's gloves in the sea, then seized the shrink-wrap's zip tab and yanked. The plastic parted. Awkwardly, she straddled the fish, lifted it by the two side-handles, and walked it into the dark slush.
"Okay, I'm standing in the sea now. It's up to my ankles. Now it's at my knees. I think it's deep enough here."
She set the fish down. "Now I'm turning it on."
The Mitsubishi turbot wriggled, as if alive. With one fluid motion, it surged forward, plunged, and was gone.
Lizzie switched over to the fishcam.
Black liquid flashed past the turbot's infrared eyes. Straight away from the shore it swam, seeing nothing but flecks of paraffin, ice, and other suspended particulates as they loomed up before it and were swept away in the violence of its wake. A hundred meters out, it bounced a pulse of radar off the sea floor, then dove, seeking the depths.
Rocking gently in her balloon harness, Lizzie yawned.
Snazzy Japanese cybernetics took in a minute sample of the ammonia-water, fed it through a deftly constructed internal laboratory, and excreted the waste products behind it. "We're at twenty meters now," Consuelo said. "Time to collect a second sample."
The turbot was equipped to run hundreds of on-the- spot analyses. But it had only enough space for twenty permanent samples to be carried back home. The first sample had been nibbled from the surface slush. Now it twisted, and gulped down five drams of sea fluid in all its glorious impurity. To Lizzie, this was science on the hoof. Not very dramatic, admittedly, but intensely exciting.
She yawned again.
"O'Brien?" Alan said, "How long has it been since you last slept?"
"Huh? Oh ... twenty hours? Don't worry about me, I'm fine."
"Go to sleep. That's an order."
"But -- "
"Now."
Fortunately, the suit was comfortable enough to sleep in. It had been designed so she could.
First she drew in her arms from the suit's sleeves. Then she brought in her legs, tucked them up under her chin, and wrapped her arms around them. "'Night, guys," she said.
_"Buenas noches, querida,"_ Consuelo said,_ "que tengas lindos suenyos."_
"Sleep tight, space explorer."
The darkness when she closed her eyes was so absolute it crawled. Black, black, black. Phantom lights moved within the darkness, formed lines, shifted away when she tried to see them. They were as fugitive as fish, luminescent, fainter than faint, there and with a flick of her attention fled.
A school of little thoughts flashed through her mind, silver-scaled and gone.
Low, deep, slower than sound, something tolled. The bell from a drowned clock tower patiently stroking midnight. She was beginning to get her bearings. Down _there_ was where the ground must be. Flowers grew there unseen. Up above was where the sky would be, if there were a sky. Flowers floated there as well.
Deep within the submerged city, she found herself overcome by an enormous and placid sense of self. A swarm of unfamiliar sensations washed through her mind, and then...
"Are you me?" a gentle voice asked.
"No," she said carefully. "I don't think so."
Vast astonishment. "You think you are not me?"
"Yes. I think so, anyway."
"Why?"
There didn't seem to be any proper response to that, so she went back to the beginning of the conversation and ran through it again, trying to bring it to another conclusion. Only to bump against that "Why?" once again.
"I don't know why," she said.
"Why not?"
"I don't know."
She looped through that same dream over and over again all the while that she slept.
When she awoke, it was raining again. This time, it was a drizzle of pure methane from the lower cloud deck at fifteen kilometers. These clouds were (the theory went) methane condensate from the wet air swept up from the sea. They fell on the mountains and washed them clean of tholin. It was the methane that eroded and shaped the ice, carving gullies and caves.
Titan had more kinds of rain than anywhere else in the Solar System.
The sea had crept closer while Lizzie slept. It now curled up to the horizon on either side like an enormous dark smile. Almost time now for her to begin her descent. While she checked her harness settings, she flicked on telemetry to see what the others were up to.
The robot turbot was still spiraling its way downward, through the lightless sea, seeking its distant floor. Consuelo was trudging through the tholin again, retracing her five-kilometer trek from the lander _Harry Stubbs_, and Alan was answering another set of webposts.
_"Modelos de la evolucion de Titanes indican que la luna formo de una nube circumplanetaria rica en amoniaco y metano, la cual al condensarse dio forma a Saturno asi como a otros satelites. Bajo estas condiciones en -- "_