You never hear of the temperature increases on the other planets. The Martian polar ice caps are melting, and the Jovian atmoshere has registered 1 degree increase (from when I dont know). But it seems simple to me-the suns getting hotter..
True, but don't try to extrapolate from that. The sun has several cycles that affect it's output. Several hundred years ago, its heat output dropped for a while, and possibly caused the Little Ice Age. Now it's putting out a bit more.
The thing to remember is that these are just fluctuations around a norm. After it spends some time putting out less heat than the norm, the next thing it is likely to do is put out a bit more, and vice versa.