Lang and I finished the primary Astrometry.net paper for submission! We will put it on the arXiv tomorrow. I am extremely excited to see it go out. Congratulations to Lang and the team.
At the end of the day the Physics Colloquium was by Halsey from ExxonMobil on carbon sequestration. It is amazing that this is on the table, because it is so expensive, it would cost as much to sequester the carbon as it currently costs to produce the oil; that is, it would double the price of oil. The talk reinforced the point that there are no real technological solutions; if we are going to reverse global warming, carbon emissions, and pollution there have to be social, cultural and political changes. Technology can only play a small role.