Rheumatoid arthritis - Causes. Rheumatoid arthritis is an autoimmune condition, which means it's caused by the immune system attacking healthy body tissue. However, it's not yet known what triggers this. Your immune system normally makes antibodies that attack bacteria and viruses, helping to fight infection.
Trying to find out what channel Discovery is on DirecTV? Well you are in luck! It can be found on channel #278 on the DirecTV Channel Guide. Discovery is also available in HD (High Definition). The great thing is that this particular channel is available in all of the Direct TV packages like Entertainment, Choice, Choice Extra, Choice Ultimate and Premier
Discovery Channel (formerly The Discovery Channel from 1985 to 1995, and often referred to as simply Discovery) is an American basic cable and satellite television channel (which is also delivered via IPTV, terrestrial television and internet television in other parts of the world) that is the flagship television property of Discovery Communications ...