I pointed out that explosions do not have a dark core.

He had learned many things, but the dark core of the mystery was still unknown.

Something stirred in the dark core of her silence.

I crawled back into bed to sink into my dark core of sleep.

Feverishly they worked as the raft turned about the dark core of the descending chute.

Sol, had contained a dark core the size of a moon.

Here, the dark core appears to have little or no correlation to any of the cluster's other components.

He has taken his woe and found, at its dark core, a kernel of possibility.

And Vraduir was at the dark core of the citadel.

The movement in the mist had a dark core.