“But now let me ask you something, Susan. As a cetacean expert, do you accept Darwin’s theory that whales used to be land mammals? I believe in the first edition of his Origin of Species he claims the ancestors of whales were a race of bears, though the accepted natural-selection species is now a wolf-like carnivore called a Mesonyx.”
“Honestly, Dr. Wallace, I’ve always disagreed with Darwin on this one. The first whales appeared about fifty million years ago. By most accounts there would have been tens of thousands if not millions of whales in the sea. That adds up to a mass exodus of a land species to a radically different environment. What would have caused it? And how do Darwin’s theories regarding natural selection account for the incredible adaptations and mutations needed to change a relatively small land animal into a fifty- to one-hundred-ton leviathan able to swim deep in the ocean? The skeletal and physiological changes alone are collectively beyond reason, and yet we’re expected to believe these evolutionary changes happened in only five to ten million years? Ridiculous.”
“For the record, Susan, I agree. But I’d still like to hear your explanation.”
“It’s simple really. The ancestors of modern whales were prehistoric fish. Take Leedsichthys. Here was an eighty-foot prehistoric gill-breather with massive pectoral fins. Subtract the gills and add lungs and a blowhole and you have a humpback whale. Whale sharks siphon krill in a similar manner to baleen whales; orcas possess jaws similar to most sharks. Other than the manner in which the species breathe, the differences are subtle. Yes, the tail movements are different, but the horizontal movements of a fluke are an adaptation conducive to breathing above the surface. Which is easier to accept: that a Leeds fish could lose its gills and evolve a blowhole and lungs or that a four-legged wolf-like creature could shed its fur, alter its entire physiology, and increase its size a hundred fold to become a whale?”
“Point taken. But why would a fish become an air-breather in the first place?”
“Adaptations are necessitated by changes in diet and environment. I just think it’s easier to accept an aquatic animal evolving an alternative means of processing oxygen and carbon dioxide than a wolf or bear entering the sea, losing its fur, limbs, and pelvis and growing a fluke.”
“Want tae ken whit I think?” True interrupted, not waiting for a reply. “I think deid is deid. A million years from now, no one’s gonna care if I breathed out of my mouth or my arse, or if Susan’s eyes were slanted different than Ming’s. What matters is love and who ye share yer sleeping bag with tae keep ye warm.”
“Yes,” I replied, “but I bet you’d care if a million years from now some archaeologist claimed your ancestors were English.”
“Or jackasses,” muttered Ben, a bit too loud.
“Excuse me, friend, but this is an A and B conversation, so C yer way oot of it.”
I stepped in between them, guiding True to an aluminum vat filled with pea soup. I ladled us each a mugful while he filled our other cups with hot chocolate. “Ease up with the sexual connotations, big guy.”
“I’m jist playing. Whit are ye doing?”
“I’m not doing anything.”
“Oh, please. To be honest, Susan, I’m more interested in intraspecies communication, specifically among orca. Maybe ye can tutor her later in yer tent.”
“She’s a grad assistant studying to be a marine biologist. We were talking shop.”
“Sure ye were. Jist do me a favor, and next time ye engage a woman not my sister in conversation, ask yerself if yer tryin’ tae impress her with that big brain of yers, or the wee small fella dangling between yer legs.”
Scientists, academics, and technicians from China, Australia, the United States, Canada, New Zealand, Britain, Germany, Japan, and France filed into the Army tent, quickly claiming one of the thirty folding chairs placed in a semi-circle facing a dry erase board. There may have been delegates present from other countries, but those were the only flag patches on ski jackets I could see from my vantage.
Missing from the meeting were members of the Russian Antarctic Expedition.
Ben and I found empty seats in the back, next to a large satellite photo of Lake Vostok taped to an easel. A white circle marked the location of the drone.
Ming was in a heated discussion with someone on her walkie-talkie. Ending the conversation, she took her place at the front of the tent. “Good afternoon. Dr. Jokinen is in the lab, finishing the analysis of water samples taken two days ago from Valkyrie Unit-1. While we are waiting, I’d like to introduce Dr. Zachary Wallace, our lead marine biologist, and Captain Ben Hintzmann, our submersible pilot.”
Ben and I gave curt waves from our seats.
A silver-haired American turned to face us. “Kevin Coolidge, United States Geological Survey. With all due respect, Dr. Liao, most of us here agree it’s way too early in the game to be sending a manned submersible into Vostok. NASA spent a lot of R and D money to develop their fleet of ROVs, as I’m sure these other marine science foundations have as well. Why risk your life and the lives of these two gentlemen when a sortie of drones can be deployed to cover a far larger area and bring back ten times the amount of raw data?”
Heads nodded in agreement.
Ming Liao seemed unaffected by her mutineers. “Dr. Coolidge, in preparing for this mission, I’ve formed a basic understanding of how remotely operated vehicles are designed. There are two forces in play that affect the stability of any object immersed in water: the center of buoyancy and the center of gravity. The distance between the two determines the vehicle’s ability to remain upright, the drone’s neutral buoyancy being a key factor in maintaining its maneuverability. It is a delicate balance and an important one. A bottom-crawling ROV that cannot sink is as useless as a drone that cannot maintain neutral buoyancy.”
“Appreciate the lecture, Dr. Liao, but let me assure you, these ROV’s were thoroughly field tested before they were shipped to Antarctica.”
“Yes, but they were tested in freshwater tanks. Preliminary lab results indicate Lake Vostok is a hypersaline environment.”
The news stunned the crowd, setting off a dozen side conversations.
The USGS administrator whistled for quiet. “How the hell is that possible? This is an inland rift lake, at least partially fed by meltwater.”
A female scientist in a white lab coat and orange parka entered the tent.
Ming waved her to her side. “Dr. Helmi Jokinen is overseeing the analysis of subglacial lake chemistry. Dr. Jokinen?”
The Finnish biologist looked like a deer caught in headlights. “Yes, sorry for the delay. To respond to Dr. Coolidge’s question, Lake Vostok is situated on a mineral bed. Residual salts from ancient oceans have rendered it a hypersaline chemocline. For those of you giving me strange looks, chemoclines are found in meromictic lakes — lakes with layers of water that do not intermix. The culprit in the case of Vostok is the presence of geothermal vents that release superheated mineral waters from out of the East Antarctic rift. Because of these vents, Vostok’s waters run warmer the deeper you go.”
I glanced at Dr. Coolidge, who seemed caught between frustration and an attraction for the Scandinavian scientist. “If you could give us the density readings, that would help.”
“Yes, well, the density of fresh water to which your drones were set was 1.00 gram per milliliter. A typical density for salt water is 1.03 grams. The sample we drew from Lake Vostok measured 1.07 grams per milliliter. In short gentlemen — and ladies — as configured, your drones don’t possess enough ballast to sink in this particular saltwater environment.”