Something about tides

As we are home feeding the dogs for the next few weeks, and therefore not blogging, it may be a good time to  ponder the Brittany Tides.

Tides are something to do with the moon and Einstein's General Theory of Relativity.

Here's Al holding down a pile at L'Aberwrac'h

Here's the same pile 6 hours later. (note how the moon has made it grow).

More on Advanced Physics for Sailors next  month.