142

Medical Devices, Medical Evidence Some of the skeletons will show obvious signs of recovery from normally fatal illnesses, obvious signs of advanced surgery like titanium pins in healed broken bones, artificial hip joints, dental crowns and fillings, root canals etc etc. They will see that the majority of the skeletons are from individuals who lived to very ...


134

Nothing. 30 million years ago Antarctica developed its ice cap. The Alps STARTED to rise in Europe. The place now known as South America detached from Antarctica and started drifting toward North America. The Great Pyramid of Giza was built around 4500 years ago. 30 million years ago that part of Africa didn't exist. To give extra perspective. The WHOLE ...


114

Yes, sadly but for a good reason Rascism is a sub-type of in-group bias, where a person will favor someone mentally labeled as "in my group" over someone "out of my group". Other examples of this type of bias show up in politics, text editor choice, religion, sports team preference and most any other instance where some characteristic can define a group. ...


110

teleportation (magical or technological, it matters not) is perfected I think the devil is in the details here. You have enormous scope for making it as convenient/inconvenient, socially loved/scorned, artificially restricted, etc. as you need it to be for your story to work, on many different fronts. Let's say it's a personal technological teleporter - ...


84

The current answers are assuming you mean from 2018 human cities. Since it will probably take some time for our ultimate demise, some technological advances could take place that would allow a species 30 million years later to detect human presence. It is lucky that a resourceful and vain group of scientists thought of this notion in 21XX. They developed ...


66

High levels of automation you say? Sounds like you want some metal-on-metal action. The natural evolution of video gaming, virtual reality and sporting events, MetalBowl began as American Football, but with robots replacing the fragile humans. The visceral, brutal nature of the game as a spectator sport was preserved, but the safety of the people involved ...


58

A millennium is a blink of an eye on a geological scale. But interesting things can happen in a blink of an eye. Even disegarding the changes which may happen as a result of the present climatological instability, small but important modification can occur here and there. I have no idea of the geographical changes between today and 3000 CE; but I do know of ...


55

I for one welcome our new robot overlords Who said the dictator had to be human? The robots could be programmed to serve and protect humans and the best way to do that is rule them with a literal iron fist. Everybody is fed and cared for. They want for nothing and are kept safe and happy but they don't run the place anymore. The robots run everything and ...


54

Time will do it. There is continuous pressure from long lived corporations to extend the length of patents. The more power corporations have in your universe, the longer patents will end up. There is a reason why the length of patents were set as they are. The patent is designed to give the inventor/designer a short term monopoly so they can recoup the ...


52

What does one normally find in a cemetery? Headstones. Headstones have designs and markings, and chances are, they're going to be at least partially preserved. Coffins. Coffins are less than 7000 years old; some wooden coffins have survived for that long somewhat intact. Modern coffins are often more durable than the early wooden constructs, and are going ...


50

These pills (containing a rich source of magic handwavium) are pretty much identical. Let's look for products which are sold by different companies, but the products themselves are more or less the same. Gasoline. Shell, Esso and so on all sell the same basic product, and there is no real difference between them. So they compete on price and convenience. ...


50

Nuclear waste. Over 90 % of naturally occurring uranium is U238, but U235 is used in nuclear reactors because this is the isotope that is fissile. Future earthlings would find large unexplainable deposits of U235 around the sites of old nuclear reactors.


49

Fantasy and real world dates rarely pass 10.000 because cultures don't tend to survive that long. Date systems generally start with a significant event as 0: rise of a king, birth of a prophet, founding of an empire, solar eclipse etc. Between those moments and the fall is rarely more then a thousand years, two thousand perhaps. I figure that if the system ...


48

Magic 8-Ball says: Unclear, ask again. Now seriously: Languages die out if they don't manage to gain additional speakers at a rate as least as big as people that speak it die. A language gains additional speakers when it is beneficial in one of two ways: either it is useful (for example because many people speak it) or it is a crucial point of cultural ...


47

Even with Moon and Mercury out, the rest of Solar system should still be recognizable. Venus, Mars, Jupiter, Saturn and the rest should still be on their orbits, though those orbits may shift a little. Also, Andromeda galaxy would not go away, and while its presence has no relation to Solar system, the distance to this galaxy may serve as a somewhat accurate ...


44

When everything desirable is available to all, the only commodity that continues to have value is the obedience of others. The dictator benefits from the deference of his subjects in a world where no other motivation for such deference will work. You cannot bribe the rich to obey you because they no longer need your bribes and you cannot bribe the poor ...


40

Even though evolution surely would have replaced all lifeforms on earth with new ones in 600 million years (assuming there are any left), the lifeforms would still have something in common with their distant ancestors -- if not visibly then at least on the cellular level. Among other things, I find it likely that the cells would still be divisible into ...


39

Lobbying, plain and simple. Copyright used to be much shorter than it is today. Every time the first Mickey Mouse cartoons are about to fall out of copyright, legislators influenced by Disney change the law to make copyright last longer. Another corporation could do the same for patents. There's nothing way-out-there about it, again, it's happening before ...


37

A Visual Dictionary A visual dictionary would be fantastic to find. Under nearly every word describing a real-world object a picture would be found, along with a written description. The written descriptions would take awhile to work out, but once you have catalogued enough correlations between bolded words and images, you could start to read the ...


36

Really a comment, but too long: You have some big problems here. 1) The astronauts don't wake up. After six hundred million years of suspended animation. You're looking at .17 mSv/year from the potassium in your body. x 600,000,000 years = about 100,000 Sv of radiation. LD50 is 5 Sv. That sort of dose is a drop-dead-on-the-spot type dose. 2) ...


33

Like the question you mentioned, the best place to look for examples of what this would look like is Asia. The approach they have historically taken has lead to many martial arts which strive towards the exact ideal you mention. The key to accomplishing this goal is to focus on energy. You have to spend energy to prepare yourself for war. Any energy ...


31

The headstone is probably more than enough; we understand the Ancestors had some sort of conception of death and possibly an afterlife because neolithic and even Neanderthals were buried, often with flowers or rubbed with red ocher or other dyes. A typical modern human burial (at least in the West, as implied by the OP), would have the body preserved with ...


30

This article in Foreign Policy is highly relevant to your question, so I'd advise you read it. The crux however is that the longest lived empires lasted little more than a thousand years. Namely the Eastern Roman empire, and the Holy Roman Empire (successor state in name only). As averages go, the empires of the near east (inclusive of ancient Egypt) were ...


28

A well-maintained firearm can last for generations, but the key is maintenance. I personally own several weapons that are more than a century old and still fire quite well. I completely anticipate they will continue to do so for another 100 years, but only if my descendants take care of them as meticulously as myself and my forebears. The reason there is ...


27

There are many factors that could make people use mundane methods. Convenience I'd rather go to the bathroom than teleport there. What if it's occupied? If activating teleport takes ten minutes, I'd rather go to the corner shop on foot. Cost If teleport costs $3 000 per mile, only rich and famous would use it. Even them wouldn't do it on a whim. ...


26

Yes, there will be As long as there is free thought, there exists the ability to prejudice against others. Racism is defined as abuse toward a particular race and culture, so if the culture still exists, there will be people to oppose it.


26

Generally larger is better. Bigger equals larger work force, more skills, bigger gene pool, more redundancy. The biggest downside is cost, more people also need more supplies, so you send the largest group you can afford to send. However, you also usually have to consider what else you can send (like can I send more fabrication equipment if I send fewer ...


26

NO* Basically: long, long ago Earth got hit by an asteroid, the size of Mars. However, instead of destroying Earth, it simply merged with it and the debris became the moon. Even if you have an asteroid big enough (today we don’t), the debris isn’t going to magically disappear: You’re going to have an asteroid belt between Mars and Venus. Moving a planet ...


26

I'm going to present a frame challenge here because there are a couple of really important factors that your question leads me to believe aren't getting proper consideration. First: The biggest reality check that almost everybody ignores when it comes to spacecraft design is that NOTHING is more important than mass. Earth-based vehicles of all types can ...


25

I think that all the others are right, but they don't have to be. If you want everyone to speak a single language there are a few ways that it could be done: Empire. Some time in the next 500 years a world power arises that is able to lay claim to a large percentage of the globe. This new empire decrees that language X should be the official language, be ...


Only top voted, non community-wiki answers of a minimum length are eligible