So faint now that it might only be my own call flung back from the thick air and muffling snow.

When you get up there, the thick air in your inner ear pushes on your eardrum.

Smoke hangs in the thick air.

We hear the wind noise building as the thick air of the atmosphere rushes past the module, a sign that the parachute will soon be deployed.

This achieved a higher altitude, since the rocket did not have to move through the lower thicker air layers that would have required much more chemical fuel.