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but the same waves could be reproduced without gravity in an appropriate accelerating frame (e.g. in a rotating body at a Lagrange point) so gravity isn't _essential_, whereas it is for gravitational waves

what crappy naming! the essential mechanism is fluid-dynamics not gravity...how confusing

or, the change in acidity from acid on the outside to alkaline on the inside provides a niche for these bacteria

article misses the point that things change. it's a different world now and the metaphors need to change with it. the desktop is now the computer, so desktop metaphors make no sense. flat design looks clean and quiet, I don't miss the days of skeuomorphism.

what about locally-produced electricity ? If an electric car recharges on locally-produced electricity along its journey then we can eliminate transmission losses

firstly, upvote for doing the calculations!

I wonder what happens when you factor-in maintenance, safety and production costs

and transportation. Hydrogen is a very inefficient way to transport electrons compared to wires.

Hydrogen and hydrocarbon fuels are just sources of electrons. The beauty of a real electric car is the efficiency of going directly from stored electrons to power.

please please do it!

what was the conclusion ? it's not gyroscopic effects because they still balance with counter-rotating wheels, it's not trail because they can still balance with negative trail. Is it some of each of these effects, if so how much ? What else is involved ?

On my way to work one morning I came across a raven funeral. I didn't know that's what it was at the time. All the ravens (Australian) were gathered broadly in a disk amongst the trees, there were about 20 of them, all quiet and quite still. I had a choice of routes, either through them or around them to the right, I chose the latter as I didn't want to disturb whatever they were doing.