“we now know Einstein’s hunch was right on the money. Evidence now suggests birds can sense Earth’s magnetic field using special photoreceptors in their eyes that are sensitive to subtle shifts in the planet’s magnetic field”
Nonsense. Einstein talked about these things presaging some physical process ‘not yet known’, or in other words, some new phenomenon physicists were not aware of. Physicists were well aware of magnetism and Earth’s magnetic field, so that wouldn’t have been what he was talking about.
“Nonsense. Einstein talked about these things presaging some physical process ‘not yet known’, or in other words, some new phenomenon physicists were not aware of.”
He refers to ‘process’. Don’t change his words.