The body is, strangely, almost human in most ways. The waist is narrow and elongated, the shoulders very wide, giving a V shaped upper back. The neck is long (maybe twice as long as an average human, or a little longer than some Vogue models) and, we will see, can turn almost 180 degrees, like an owl. The body overall is more slender, proportionately, then the average human, reminiscent of a Masai or Watusi. The musculature is sharply defined, given no sense of emaciation despite the thin proportions.
The avatars in their womb-like environment are at their normal metabolic rate and grow rapidly. Their muscles are constantly electrostimulated, so that they develop normally.
The hands are graceful, with three very long fingers, and one opposed thumb. The fingers curve smoothly, bending without joints. This sounds off-putting, but it is really quite beautiful.
The faces are exquisite... with cheekbones high as any Pharoah's and large wise eyes, maybe twice the size of ours. When open they dominate the face, like those of a cat, or a lemur. The mouth is also large, but essentially human, with a faint cat-like bifurcation of the upper lip, and a coloration like permanent deep purple lipstick. The teeth are white, with pronounced canines, upper and lower. These guys are clearly carnivores, or at least omnivores.
Did I mention the tail? They have a tail. Long and slightly prehensile, but more like the tail of a panther than a monkey.
A complex pattern of iridescent dots and lines, perfectly symmetrical, runs over the body, almost following the lines of the nervous or circulatory system. These are bioluminescent chromatophores, and they glow in the dark like fireflies. The alien can communicate with these, and in fact they usually are shifting and changing color to indicate mood and emotion, without conscious control.
The body has no hair whatsoever, though there is what looks like a black pony tail, or queue, originating in the back of the head and hanging down almost to the waist. This is not hair, but actually an external part of the nervous system, and more on this later.
ON THE FLIGHT DECK the haggard pilots start the shutdown of the fusion/antimatter engines.
OUTSIDE, the arc-light ceases abruptly. The entire drive module glows cherry red with radiant heat, and the exhaust nozzles are almost white. The ship creaks and groans as it begins to cool.
Prometheus drifts against the stars, nearing the surprisingly Earth-like Pandora.
INSIDE, in weightlessness, the passengers begin to emerge from their hibernacula. They look like handmade shit... hungover badly from the hibernation drugs.
Josh sits up groggily and looks around. His hair has been cropped back to a brush-cut, and he is cleanshaven.
An announcement is telling them what to do and where to go, and that they will soon be entering orbit around Pandora. Josh pulls himself out of his capsule, maneuvering nearly as well as the other passengers in zero-g, even with his inert legs.
Moving hand over hand, Josh floats over to the tank containing his alter ego, the avatar body. He is amazed to see the growth in the three years which have elapsed on the ship.
The avatar stretches, catlike, extending to its full height, dwarfing Josh. And as it turns in the amniotic fluid, Josh sees the face of his avatar... and it looks like him. Despite the alien proportions, the features are definitely reminiscent of his.
A tech tells him he has time to get some breakfast and still make it back to "see himself born".
THE BIRTH. Technicians in plastic suits and breathing equipment enter a bright sterile chamber through an airlock. Josh, similarly attired, follows them in. They seal the door. One of them tells him that the air is a match for Pandora's... a poisonous brew of ammonia, methane, CO2, oxygen and nitrogen. Even a little hydrogen cyanide. In the center of the chamber is the tank housing Josh's avatar. Josh is nervous and unsure what to do, but they tell him it's always best for the controller to be present at the birth.
Using a flexible collar, like a synthetic sphincter, to retain the amniotic fluid in zero gravity, they ease the body out of the tank into the birthing room. It looks exactly like a giant baby being born from a glass and rubber womb.
The avatar kicks feebly, and everybody is grappling with the slimy newborn body. The technicians ask Josh to help hold it. Like an overwhelmed father, he looks like he is about to faint. The pure raw shock of life, struggling into existence, effects him far more than he would have thought.
Josh struggles to help give birth to himself.