For informative/scholarly both Radiolab and This American Life are great. They're very well produced and manage to be both informative and super entertaining.
As far as apps go, I like podkicker for android quite a bit.
If you're at all interested in something more on the comedy side, I can't recommend "The Complete Guide to Everything" enough. It's ostensibly a guide to various topics, but it's really just two friends bickering, bantering, and often misinforming. It's really, really, funny.