fog

Greg assured me that even in dense fog you know where land is by sensing the direction of the waves.

Known as the "silent killer", hep C may cause few symptoms initially, with early signs including night sweats, brain fog, itchy skin and fatigue.

Any major construction project is a herding expedition in a blinding fog, and it can be a test of patience and sanity.

Photos on social media showed them slouched on plastic chairs, swathed in plastic bags fogged up by their breath.

"I didn't know who I was anymore. I was just walking around in a fog; I didn't know how to make a decision anymore," she says.