[wet]

I've been informed (by Dana M.) that the human circadian rhythm is about 25 hrs. long (not 24), and the daily tidal period is about 24 hours and 50 minutes. This fits with daily seashore foraging in ancient humans, with slight divergence since the last 50,000 years or so due to technology, agriculture, boats, etc.

Can anyone verify this close match-up between circadian and tidal rhythms?

DDeden