Discovery Channel in general, though lately it has too many animal shows. Sometimes PBS has something decent to watch. The shows on physics and astronomy are starting to get a little crappy, unfortunately, due to repeated animation footage and some weird attempt to cliffhang certain facts that producer decided are "cliff hangerish", lol. "And the sun will some day go boooom!" Commercial "...in a few more billion years like this dwarf star that blew off most of it's stellar mass...blah blah...expanding universe which means entropy will make us (producer means Earth and it's solar system) alone in a sea of nothing!" Da da da dooooom! another commercial.