They had one! And so do we. They both end on some sort of the cycle and the world never ends because of our arbitrary selection of scope. Fraser is really tired of having to argue about this sort of thing with death-cultists. The end.
Earth’s layers. Discovering new and different regions of the earth’s internal structure via seismography. Rate of temperature increase. Effect on oceans. Heat retention and radioactivity.
Space settlement and Christopher’s disappointment. Seveneves as the gold standard for how to relocate humanity to space in an emergency.
Should we keep giraffes? Cows? Any larger fauna? Recognition of the complexity and energy-inefficiencies of the food chain. Surviving on crickets and phytoplankton.
The earth’s internal metal. Pole-flipping!
Propagation of energy via wave through fluid and how it probably shouldn’t roll the ship. Asteroid impacts, landslides, and misplaced fossils.
Fraser’s got some stuff to say on this matter, tell-you-what.