3,000 AD
Humans are typically 7ft tall now; lifespan for the average person is 200+*
For centuries now, the technological singularity has produced enormous wealth and prosperity. There have been across-the-board improvements to healthcare, education, living standards and opportunities for all, and this has led to humans evolving into a race of giants - 7ft tall, muscular, tanned and highly athletic, with lifespans of 200+.
Note that this default lifespan refers to purely "natural", unaltered, biological humans, who comprise a tiny minority by now - the vast majority of citizens have opted for genetic engineering and biotechnology treatments which extend their life indefinitely. Mind uploading to cyborg bodies is also a popular choice now and is being used to achieve practical immortality by many people.
5,000 AD
Construction of the Solar Ring has been completed
The first particle accelerators built by man were small, primitive, terrestrial-based devices. In the 20th and 21st centuries they were only a few dozen kilometres in circumference at most, resulting in energies of barely a few thousand GeV.
By the fifth millenium, construction of a particle accelerator covering the entire perimeter of the solar system has been completed, using material from the Kuiper Belt, Oort Cloud and neighbouring star systems. This becomes the largest scientific experiment in history - powerful enough to accelerate particles to the Grand Unification Energy. This allows the very earliest conditions of the Universe to be simulated. The electromagnetic, weak and strong nuclear forces (three of the four fundamental forces in the Universe) can be observed for the first time at precisely the same strength - becoming effectively different aspects of a single force. Quarks and electrons, too, can be seen as essentially the same, achieving another unification.*
The construction of this colossal ring is achieved using a combination of advanced femtoengineering, large-scale teleportation and matter replication, interplanetary automation and AI super entities.
10,000 AD
Venus has been terraformed
By the 10th millenium, Venus has been transformed into a habitable, Earthlike world. This has been achieved by a number of means. Primarily, it has been the result of redirecting comets from the Oort Cloud. These were guided through the solar system and into the upper atmosphere of Venus, where they released huge quantities of water.
Other techniques involved the gradual capturing and removal of CO2 (achieved by "beaming" it away into space), as well as seeding the ground with extremophile bacteria, which absorbed and converted the toxic gases into breathable oxygen. The planet's orbit was also shifted slightly, bringing it closer to the "Goldilocks Zone" enjoyed by Earth, and its day and night cycle was accelerated from 117 days to 24 hours.
With lush tropical oceans, Venus now has two large, dominant landmasses - Aphrodite and Ishtar - along with a number of smaller subcontinents and islands. The average surface temperature has stabilised at around 30°C.
Over the next few millenia it will be transformed into a thriving centre of scientific advancement.
296,000 AD
Voyager 2 is approaching Sirius
If the probe still survives today, it will have travelled over 25 trillion miles from Earth.*
Sirius is the brightest star in the night sky when viewed from Earth.
1,000,000 AD
Planet-sized computers; AI running all governmental and other systems; the descendants of humanity are possibly a Type 3 civilisation now
Purely biological humans are exceedingly rare now. The very few which do remain comprise only a tiny fraction of a percentage of the total sentient minds in existence. Though free to come and go as they please, they have practically zero influence in any governmental systems on Earth or elsewhere, being regarded as wholly subordinate to the AIs and super entities. As a species, homo sapiens has continued to evolve over time, and this has led to a 100% increase in cranial size, a near-total absence of hair, a further elongation of limbs, and an average lifespan of several hundred years.
Those biological humans who do take advantage of the countless technologies available at this time (which is more than 99% of the population by now) can expect to live indefinitely if they opt for genetic engineering treatments - while non-biological treatments (i.e. such as mind uploading) offer a whole new realm of possibilities.
By this date, much of the Milky Way has been explored by the hybrid AI/transhumans and their sentient ships. Faster-than-light travel is now possible via warp bubble technologies, which effectively bypasses the laws of relativity. Even the Andromeda and Triangulum galaxies are being explored now.
Planet-sized computers are being built everywhere, on a constant basis, with literally every available resource going towards their production. All of the "dead" worlds, comets, moons and asteroids considered uninhabitable are being converted to elementary particles for the creation of these Godlike machines, which are forming a vast network hundreds of thousands of light years across space. Each computer in the network is capable of instant communications with any other computer - no matter what the distance - and they can be used for a variety of purposes - including long-range telescopic observation, cataloguing of astronomical anomalies, gigantic scientific experiments, and even some limited manipulation of space-time.
Despite all this, no advanced alien intelligences have been contacted yet. However, ancient ruins have been uncovered on a number of worlds - indicating advanced civilisations at some point in the distant past; and there are hundreds of planets with rich ecosystems brimming with diverse plant and animal life, some of which is comparable in intelligence with mammals such as dolphins, monkeys, etc.
On some of the more bizarre worlds, a number of silicon and ammonia-based lifeforms have also been found.
Most of the biological (or partially biological) communities at this point are steering clear of the galactic core, which is filled with extremely high concentrations of gamma radiation, blackholes and other hazards - dangerous even with the stunning technologies and protections available today.
10,000,000 AD
Triton’s decaying orbit has led to it breaking up around Neptune, forming a new ring system
That’s assuming the moon still exists in a form we would recognise. The descendants of humanity may have converted its raw mass into artificial structures by now. Even Neptune itself may no longer exist – the planet’s hydrogen and helium may have been siphoned off for use in starships and industrial processes.
50,000,000 AD
Africa collides with Europe, forming a new mountain range to rival the Himalayas
As a result of this, the Mediterranean no longer exists. The Red Sea, Black Sea and Caspian Sea have also disappeared. Meanwhile, the Atlantic Ocean has continued to widen, and North Amercia is being distorted with California sliding northward towards Alaska. Southeast Asia is beginning to merge with Australia.
The Sun is becoming noticeably larger and brighter, raising global temperatures by several degrees. Much of the planet is now covered by deserts. Of course, this scenario assumes that the Earth hasn’t been altered in some way by artificial processes - possibly including being moved to a new orbit.
100,000,000 AD
By now, contact has been made with an advanced alien civilisation of some kind
This occurs in a neighbouring cluster of galaxies, tens of millions of light years from Earth. Despite an exhaustive analysis of virtually every planet in the Milky Way, Andromeda, Triangulum and other nearby galaxies, no trace of alien civilisations was found in the Local Group, other than some ancient ruins from the distant past.
It was over a hundred million years before the first contact was made with living, breathing extraterrestrials of human-level sentience or greater. Advanced intelligence and sophisticated technology has therefore turned out to be exceedingly rare... in this part of the Universe, at least.
It should be noted that - in any case - the species homo sapiens has long since disappeared from existence as a civilisation, rendering any "first contact" impossible. Only a handful of human beings still exist in any physical form, and none of them are alive. The very few which remain today do so in the form of frozen specimens, museum exhibits, ancient science archives, and so on.
Their evolutionary descendants now occupy a substantial portion of the Virgo Supercluster. These neo-humans - entirely dependent on advanced biotechnology - would appear to their distant ancestors as limbless bodies with gigantic pale heads, devoid of any facial features, and supported in pod-like machines enabling them to float or teleport at will.
These beings are vastly inferior to the AI, robots and other machinery of today, of course - forms of sentience which effectively exist on a different plane of consciousness altogether, being able to run at speeds trillions of trillions of times faster than any biological lifeforms, and with powers that are considered Godlike to the latter.
250,000,000 AD
A supercontinent is forming on Earth
The next Pangea, "Pangea Ultima" will form as a result of subduction of the ocean floor of the North and South Atlantic, beneath eastern North America and South America. This supercontinent will have a small ocean basin trapped at its center.
That's assuming the Earth still exists in a form we would recognise. The descendants of humanity may have converted its entire mass into a giant computer by now (or some other artificial structure).
2,000,000,000 AD
Sol is becoming a red giant
The Earth's seas and oceans are beginning to evaporate. Even the coldest regions are seeing temperatures reach over 60°C. All plant and animal life has been evacuated and transported to Earthlike planets elsewhere in the galaxy.
3,000,000,000 AD
The Andromeda Galaxy has begun to collide and merge with our own
Milky Way galaxy**
Stars and planets within each galaxy are unlikely to actually collide, as galaxies are in fact somewhat diffuse.
Such mergers are relatively common; Andromeda, for example, is believed to have collided with at least one other galaxy in the past.
5,000,000,000 AD
Sol is a red giant
The inner planets of the solar system have been destroyed and absorbed by the ballooning Sun.
1,000,000,000,000 AD
Star formation is declining in many galaxies*
By now, a significant percentage of galaxies throughout the universe are beginning to "burn out", having been depleted of the gas clouds needed to form stars.
2,000,000,000,000 AD
Galaxies beyond the Local Supercluster are no longer visible*
Dark energy has continued to drive the expansion of the universe at an accelerating rate. By now, the volume of the universe is so great - and the speed of acceleration so high - that only the nearest galaxies are still visible.
Even for the highest energy gamma rays, a redshift of 1053 means their wavelength is stretched to greater than the physical diameter of the horizon.
Because of this, any remaining intelligent life today may no longer be able to obtain new empirical data on the state of large-scale structures on scales observed in the past.
20,000,000,000,000 AD
Red dwarf stars are dying*
By now, even most of the red dwarfs that were present in our galaxy during the 21st century have faded away - leaving behind only cold, dead "black dwarfs" emitting trace amounts of radiation. These include once famous stars such as Proxima Centauri, Barnard's Star and Wolf 359. The Milky Way galaxy is becoming a dark, empty place dominated by enormous blackholes.
100,000,000,000,000 AD
The end of the stellar era*
The last of the main sequence stars in the universe has withered away to nothing. The only stellar-mass objects now remaining are "stellar remnants" (white dwarfs, neutron stars and black holes). Brown dwarfs also remain.
Planets everywhere have been dislodged from their previous orbits and left drifting as "rogues", with many ending up in black holes.
10,000,000,000,000,000,000,000,000,000,000,000,000 AD
The degenerate era of the universe*
In this era, practically the only energy being generated in the universe is through proton decay and particle annihilation. The only remaining objects are neutron stars, white dwarfs and black holes. All of the planets, moons, comets and other such bodies have either decayed into their constituent atomic particles, or been absorbed into stellar remnants.
100,000,000,000,000,000,000,000,000,000,000,000,00 0,
000,000,000,000,000,000,000,000,000,000,000,000,00 0,
000,000,000,000,000,000,000,000 AD
The black hole era of the universe*
Only black holes and subatomic particles remain. The universe has expanded so much that these individual particles may be separated from each other by distances of many light years. Black holes themselves are now evaporating by Hawking radiation.
Infinity
The dark era of the universe*
The last remaining black hole has evaporated.
From this point onwards the universe is composed only of photons, neutrinos, electrons and positrons - with no way of interacting with each other.
The universe continues to expand forever... but is essentially dead.
The end is nigh.
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