The last Info from the site's IRC is that the site has been under a constant DDoS since Nov 16th and the host has shut them down.

Moving data and changing things around would mean about 4 days of uptime before their deadline of Nov 30th. And they feel it isn't worth the effort.

So this is the end of ScienceHD. The tracker or website will not be coming back up. The IRC server will keep running until December at least.

Torrentday seems to have some issues too.