A Transparent Shell

Everything was motionless until a sudden warmth pulsed along my spine. My eyes blinked open, instantly piercing the dim shadows outside. Can I move? I carefully flexed my front toes, feeling the sharp tips slide against the slick surface pressing against me. A faint squeak echoed inside the tight, contoured shell. I raised my paw slightly and nudged the smooth plastic dome, testing its firm curve. It holds me snug, yet beyond this clear shield rests a vast and unmapped territory. How far does that dim space out there go?