The project harnesses the power of the Internet to allow users to identify books of interest with a precision and at a speed previously unimaginable.

Blake's half-prayer was answered with unimaginable speed.

Briefly they hovered, then with the same popping sound they had gone, their speed unimaginable, direction unknown.

We skim the surface of the clouds, feathery wisps whipping by at unimaginable speed.

He was hurtling straight toward it-with unimaginable speed.

The two beams of protons and antiprotons, circulating in opposite directions at unimaginable speed, still had not been brought into contact.

The three figures frozen in space as they await the sickening impact of whatever it is that is coming at them at unimaginable speed.

It was indeed like traveling at unimaginable speeds, for they were literally in motion.

Light still moves at 4 km/sec, an unimaginable speed for this world where nothing at all moves.

And then he died, as if he had been snatched away by some great thing that had been passing at unimaginable speed.