Transverse waves? Them the ones that across the beach? And I know all about gratings, they cover the holes where the water disappears when it rains, usually on the road.
Anyway. There is one overwhelming bit of evidence everyone is missing. I call it the "hmmm" evidence. Whenever that is uttered in a video or typed, you know they know the facts. Stands to reason.
Damn. Two bits of overwhelming evidence, "hmmm" and "stands to reason".
And not forgetting the "does not look right".
Damn damn... three bits of overwhelming evidence......
(shamelessly stolen idea)