I suppose we will now be inundated with megalith doom scenarios on the Discovery and Learning Channels. Something else to worry about.
If it isn't meteorites it's super volcanoes; if it isn't super volcanoes it's plagues and pestilence. Now it's sinking megaliths.
They always neglect to mention the extremely small chances that any of these events wil happen.
Discovery maybe, but TLC? For at least five years now they've been airing nothing but quasi-medical freak shows.