Looks like this is a temporary site while they retool:

https://t.co/D8aFIGZAEH is now live, a temporary design to showcase announcements and content previews. Full site and atomized story app OTW

— Circa (@Circa) April 28, 2016

Hmm. Circa is "A new mobile-friendly, video-driven news and entertainment portal designed for the next-generation" https://t.co/29U8uHp059

— Mathew Ingram (@mathewi) April 28, 2016