The sun sets on 24 December at 3.55pm in the UK, and rises the following morning at 8.05am.
The Earth sees about 760 thunderstorms every hour, scientists have calculated.
Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
Carbon dioxide is a trace gas and by itself will produce little warming. Also, as CO2 increases, the incremental warming is less, as the effect is logarithmic so the more CO2, the less warming it produces.