[razorback-bert]

I read the title as Solomon uses magnetism, guess I need to go to bed.

[Secret Agent Man]

I don’t doubt it at all.

Birds have compounds in their eyes that they can actually see the earth’s magnetic field lines that help guide them in migration. Apparently can really see the lines well around twilight times.

[Vendome]

Must be because of their personality...

[FatherofFive]

They die after spawning.

reminds me of the old joke - why do men die earlier than women? Because they want to.

[shibumi]

"...salmon use magnetism ..."

And I hear tell that flies use maggotism.

[Rocky]

I have read that the earth’s magnetic field sometimes reverses, and that during the transition, the magnetic field greatly diminishes. I wonder what happens to such homing devices in salmon and in birds during such episodes?