Electricity Research Not Available in Research Menu

[BlueTressym]

Hi.  Got a weird one here; In my Research menu, the 'Electricity' project is missing.  As far as I can tell from memory, all of the other things are there, including things for which Electricity is a prerequisite. 

As you can see by the screenshot, 'Microelectronics Basics' is there, but there's no line going back from it, so the Electricity doesn't seem to be just off the page, but not there at all.  If you click on 'Microelectronics Basics', it still lists 'Electricity' as the prerequisite, but there's no way to actually select it since it's apparently vanished into thin air. 

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