Well, everybody who reads this blog called me this morning in a panic because of that last post. The post where I explained how we’re all doomed. I went to bed before going on to explain that we’re not doomed. Sorry, gang.
Probably I should have mentioned: the molten metal inside the Earth is magnetic. It behaves like a giant magnet. Magnets have 2 poles and so does Earth, thanks to its sizzlin’ hot molten metal core. If you’ve ever put a magnet on a sheet of paper and sprinkled metal filings onto it, you’ve seen the filings arrange themselves into circular patterns around both poles. These are magnetic fields.
There are gigantic magnetic fields around Earth’s north and south poles that extend way out into space. You can’t see them. You know what they do? They act like a shield against whatever dust the Sun keeps shooting at us. That’s why we’re not gasping for oxygen and wiping sun-dust off our computer screens.
Pretty neat, eh?
I add this link in the interests of science: