well the language statement is false, in a spoken language you have that kind of change but our language is codified, written down, and additions are managed.
Racial diversity will continue because that is just an ingrained behavior. russia has bordered asia forever, yet most of russia is still white with very minimal mixing over the last 1500 years (this is cited because there is no major geographical barrier to the intermingling, like between africa and europe. I agree that there will be less racial diversity in the time span, but it will still be going strong.
tectonic movement ceasing, right from wikipedia:
The iron-rich core region of the Earth is divided into a 1,220 km (760 mi) radius solid inner core and a 3,480 km (2,160 mi) radius liquid outer core.[60] The rotation of the Earth creates convective eddies in the outer core region that cause it to function as a dynamo.[61] This generates a magnetosphere about the Earth that deflects particles from the solar wind, which prevents significant erosion of the atmosphere from sputtering. As heat from the core is transferred outward toward the mantle, the net trend is for the inner boundary of the liquid outer core region to freeze, thereby releasing thermal energy and causing the solid inner core to grow.[62] This iron crystallization process has been ongoing for about a billion years. In the modern era, the radius of the inner core is expanding at an average rate of roughly 0.5 mm (0.02 in) per year, at the expense of the outer core.[63] Nearly all of the energy needed to power the dynamo is being supplied by this process of inner core formation.[64]
The growth of the inner core may be expected to consume most of the outer core by some 3–4 billion years from now, resulting in a nearly solid core composed of iron and other heavy elements. The surviving liquid envelope will mainly consist of lighter elements that will undergo less mixing.[65] Alternatively, if at some point plate tectonics comes to an end, the interior will cool less efficiently, which may end the growth of the inner core. In either case, this can result in the loss of the magnetic dynamo. Without a functioning dynamo, the magnetic field of the Earth will decay in a geologically short time period of roughly 10,000 years.[66] The loss of the magnetosphere will cause an increase in erosion of light elements, particularly hydrogen, from the Earth's outer atmosphere into space, resulting in less favorable conditions for life.
it would not take humanity 100,000 years to terra form mars. With our CURRENT level of tech (and us really wanting to) it would be under 300 years.
Humans on other planets evolving into bizzarre unrecognizable creatures: nope. We no longer breed for survival of the fittest to any meaningful degree. We control our environments, we do not adapt genetically to them. Without some very purposeful genetic engineering the human form is pretty much at its zenith barring some minor natural alterations and again, purposeful genetic engineering.
The sun being 10% more lumnious in a billion year.. yeah sort of
again wikipedia:
One billion years from now, about 27% of the modern ocean will have been subducted into the mantle. If this process were allowed to continue uninterrupted, it would reach an equilibrium state where 65% of the current surface reservoir would remain at the surface.[50] Once the solar luminosity is 10% higher than its current value, the average global surface temperature will rise to 320 K (47 °C; 116 °F). The atmosphere will become a "moist greenhouse" leading to a runaway evaporation of the oceans.[83][84] At this point, models of the Earth's future environment demonstrate that the stratosphere would contain increasing levels of water. These water molecules will be broken down through photodissociation by solar ultraviolet radiation, allowing hydrogen to escape the atmosphere. The net result would be a loss of the world's sea water by about 1.1 billion years from the present.[85][86] This will be a simple dramatic step in annihilating all life on Earth.
There will be two variations of this future warming feedback: the "moist greenhouse" where water vapor dominates the troposphere while water vapor starts to accumulate in the stratosphere (if the oceans evaporate very quickly), and the "runaway greenhouse" where water vapor becomes a dominant component of the atmosphere (if the oceans evaporate too slowly). The Earth will undergo rapid warming that could send its surface temperature to over 900 °C (1,650 °F) as the atmosphere will be totally overwhelmed by water vapor, causing its entire surface to melt and killing all life, perhaps in about three billion years. In this ocean-free era, there will continue to be surface reservoirs as water is steadily released from the deep crust and mantle,[50] where it is estimated there is an amount of water equivalent to several times that currently present in the Earth's oceans.[87] Some water may be retained at the poles and there may be occasional rainstorms, but for the most part the planet would be a dry desert with large dunefields covering its equator, and a few salt flats on what was once the ocean floor, similar to the ones in the Atacama Desert in Chile.[12]
