We check this website, now sciencechannel.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is sciencechannel Down Right Now? - NO! sciencechannel is up!
If you have problem with access to site sciencechannel, and domain sciencechannel.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).