After playing with groups for a couple days, we discovered a hidden gem that may not be completely obvious when you first start using the feature.

ENGADGET: Windows Phone 7.5 Mango in-depth preview (video)

The oddest response, though, is if you write making an obvious point about an historical period or historical figure, you will get lots of letters and emails insisting that the obvious thing about the guy or his time is completely wrong.

BBC: A Point of View: Science, magic, and madness

We cannot know which among the truths we consider so patently obvious today will one day turn out to be so absolutely, completely mistaken, that we will blush with embarrassment at the thought that we once embraced it.

CNN: Don't be like Washington; listen to other views

It has been obvious for many months that The Times management has been itching to go totally tabloid (or completely 'compact', to use its preferred term).

BBC: NEWS | UK | Death of the broadsheet?

The atmosphere there was completely calm, and they've been seen by our embassy doctor, they're not suffering any obvious physical ill-effects from this at all, and half an hour ago, when I spoke to Peter Low, his wife and son were sleeping.

BBC: Breakfast with Frost