Review of Last Days on Earth

Covers all the important points, true and good forecast of events, well done!

Just a bit more on space radiation harms...

Double super massive dark star merging at center of 890 light year distant galaxy

if they completed merge 850 years ago

then

40 more years before gama ray bursts & gravity shock waves both propegate with speed of C reach earth

under water neutral bouyency survival city sphere would be best strategy because avoids major earth movements that cave built shelters are not protecting from.

And

2029 apr 13

will have asteroid arrive to earth bellow com sat orbit so it will be a close shave if not a collision ...