The title reads like a newspaper headline: «New theory questions why we sleep». It sounds calm and curious, as though sleep were an abstract puzzle for researchers. The poem that follows answers with a body's evidence instead of an argument. Its speaker has gone without sleep, and the world has started to shimmer and then rot a little. The central idea is that sleeplessness is a physical state that changes how everything looks, sounds and tastes. It first feels like power ("I felt invincible") and then settles into plain, grubby exhaustion.
The poem is built from four short pieces: three lines, two, three, three. There is no rhyme and no regular metre. The lines are short and the diction is flat and domestic: owl, tap, coffee, fur. That plainness suits the subject, because a sleepless mind often notices small things without being able to explain them. The rhythm is conversational, with the line breaks making small pauses. "This same screech owl / was trilling at 4:00 p.m." breaks just after the noun, so the owl hangs there for a moment before the verb arrives. The exact time is a nice touch. It sounds like an entry in a log kept by someone who has stopped trusting the usual divisions of day and night. A screech owl is a night bird, so hearing it in the afternoon suggests the speaker's schedule has come loose. "This same" hints that the speaker has heard it before, perhaps through a long run of hours without rest, though the poem never says so.
The second stanza is the shortest, and it contains the poem's strangest image: "Water from the tap — / it's still moving when I drink it." The dash makes the speaker stop and stare. The line works on two levels. Literally, water poured from a tap is turbulent. But the word "still" also puts stillness and motion side by side, which suits a poem about a person who cannot be still. The water seems to carry its restlessness into the drinker. Sound links this stanza to the owl and to what follows. The owl's "trilling" is a kind of vibration, and in the next stanza the speaker "trembled like that." Owl, water and body all shake in the same way. The sleepless mind seems to find a shared tremor in everything it meets.
That third stanza is the hinge of the poem. The tense moves into the past: "I trembled like that once, too, / after days without sleep." The "too" puts the speaker alongside the owl and the water, as one more shaking thing. Then comes the shortest, flattest sentence: "I felt invincible." There is no exclamation mark. The speaker reports the feeling and lets the reader see how false it was. The poem seems to suggest that this brightness belongs to the early stage of sleeplessness, when the nerves are buzzing and the cost has not yet arrived.
The cost arrives in the last stanza, back in the present tense. "Gray fur spreads / through the coffee grounds." Judging by the imagery, this is most naturally mold growing on neglected grounds. It is an ordinary, slightly disgusting detail, and it implies that days have passed without anyone tidying up. The verb "spreads" makes it sound slow and unstoppable, the opposite of the earlier tremor. The grounds also suggest the caffeine the speaker has relied on to stay upright. The last line, "I'm bleary-eyed again," ends on a deflated word. "Again" suggests a cycle: the speaker has been here before and probably will be again. The poem refuses to resolve into a lesson. It simply ends in a tired kitchen.
What makes the poem significant is how much it does in so few words. It takes a detached headline about why we sleep and tests it against the experience of not sleeping, and the experience turns out to be stranger and more physical than any theory. It builds its argument from a few concrete images and lets the reader feel the shift from electric alertness to murky fatigue. Its restraint is part of its truthfulness. A louder poem would have exaggerated the invincibility or the decay, whereas this one trusts small observations, such as a bird at the wrong hour, a glass of water that will not settle, and a gray bloom in the coffee.