Today is a peculiar kind of hell for aggregator sites like this one, as almost no press release or announcement can be trusted, and it somehow doesn't feel entirely sporting to call out other site's jokes before people have had a chance to fall for them (I trust by now you've figured out ours from this morning).
So instead, let's make this participatory: what April fools did you see today? Which worked? Which didn't? Include links where possible. I'll be adding to them myself.
If you still wish to be pranked by other sites, you need not click comments to be spoiled, but if you're wondering what news is or isn't real, it could be a help.