The title never says whether the caveman is the figure in the ice or the person staring at it, and the poem keeps that question open. The story is simple. A "you" approaches a stretch of ice, reaches out, and the ice melts under the hand. Something alive, kept for "millennia", is uncovered. It wakes, looks into the viewer's eyes, and the viewer runs. The creature retreats into the ice. The central idea is that meeting something ancient and vulnerable, whether a buried part of yourself or another person, is both wanted and unbearable. The fear that makes the hand reach out slowly is the same fear that makes the body flee. By the end, both sides are afraid.
The poem has eight lines, no rhyme and no regular beat, so punctuation does most of the work. The first five lines are short, flat statements, nearly all ending in full stops, like careful steps on thin ice. Then the lines stretch. Line six, "Underneath a life preserved for millennia is uncovered", is longer, and line seven is the longest: "Just as the new life is reborn you run away as soon as it looked into your eyes." It has no comma and no place to pause, so the reader has to hurry through it, and the sentence itself seems to run. The last line is short again and quiet, like a door closing. The tense also slips in line seven, from "is reborn" to "looked". Whether deliberate or not, it squeezes birth and flight into one instant, so the new life barely gets to exist before it is frightened away.
The word choices carry a lot. "Overgrown" is normally used for gardens and abandoned houses, so applying it to ice suggests that time has grown over something and hidden it. "Shivering from being near" doesn't say who is shivering, the watcher or the ice, so cold and fear blur together. Then "Cracks run through the ice" is followed by "you run away". The same verb links the breaking surface to the breaking nerve, as if the ice had warned of the viewer's reaction in advance. "Fearfully" opens line four, putting the emotion before the action, and "Only to see it melt" carries a note of regret. The gentlest gesture does the damage, because the warmth of a hand is what thaws. Nobody in the poem intends harm.
The vocabulary falls into two camps. "Preserved" and "millennia" belong to museums and deep time, and "millennia" is the one grand, Latinate word in a poem of plain speech. "Reborn" and "looked into your eyes" belong to the living. The look is the most human moment in the poem, an act of recognition, and it is exactly what sets off the flight. The word "caveman" appears only in the title. Inside the poem the figure is "it" and "the new life", so it arrives as a being before it gets a label. The final line, "Scared the new life hides once more within the ice", gives it the same fear the viewer showed in line four. The hiding is a mirror image of the running, and neither side is the villain.
The poem can be read several ways. The caveman could be a frozen emotion, a buried self, or a person who has shut down and flinches when someone gets close. The caveman might also be the viewer, whose instinct to run is as old as the figure in the ice. Readers today might think of glaciers giving up ancient remains, though the poem never mentions that. The poem is significant for how much it does with so little. The second person pulls the reader into the scene, so the failure feels like ours. And it offers no rescue. The ice closes over again, the moment is lost, and the poem doesn't say whether the cracks heal. It leaves the reader to wonder whether the hand would reach out a second time.