On Wednesday, 20 March 2019 09:41:24 UTC, Bob Eager wrote:
On Wed, 20 Mar 2019 09:04:13 +0000, Chris Hogg wrote:

A friend at uni used to talk of walking speed as
picoparsecs per hour (although actual walking speeds are about 0.2pps/h,
or 4mph)

The one I know is that one inch per second is one attoparsec per
microfortnight (near enough).

I like the speed of light as measured to be *about* 1 foot per nanosecond .