Because now I'm really depressed and I'm not sure why.

I usually wake up around 4:00 a.m. to use my breathing medication (asthma). I turn on the TV and usually watch Numbers on TNT. Well, TNT is running a 24-hour marathon of Supernatural, a show I choose not to watch.

So instead I land on NatGeo and a program about the end of the Earth. We go a few billion years into the future when the continents have all drifted back together which causes the land mass to become a desert, a huge increase n volcanic activity, the acidification of the vast ocean, the removal of all the CO2 from the air (it dissolves into the oceans), the death of all plant life, the expansion of the sun, evaporation of the oceans leaving a salt crust, the death of all life, even the extremophiles (the last vestiges of life which still survive in the extreme salinity as the oceans evaporate), the liquidification of Earth's surface, Earth's tidal effect on the sun which causes a bulge, and finally the Earth being consumed by the sun.

We tend to think of this blue planet always being here but eventually it turns into a brown flat ball, all mountains gone, life gone, it's death knell being written by an expanding sun in its death throes.

If we don't get off this planet, humanity will be gone. OTOH, since we don't show much humanity on a global scale, perhaps that's not such a bad thing.

Somewhere else in the Cosmos there will be a planet (we hope) where life is emerging, single microbes combining into more complex matter and the process begins again. We can only hope that whatever lifeform(s) become(s) very complex there will take better care of its planet and of each other.

Back to bed, hopefully not to dream of dying planets.