Is This A Likely Scenario

Which is the most likely scenario for the death of the universe?

Theories for the ultimate fate of the universe -Big Freeze - Future of an expanding universeContinued expansion of the universe at an accelerated rate will cause temperatures in the universe to asymptotically reach Absolute zero. Stars are predicted to continue to form for the next 1–100 trillion years, although the material needed for star formation will eventually diminish.As fewer and fewer stars form, galactic systems will begin to cool down and combined with the expansion, the state of the universe will approach 0K / - 273.15 C. Particles will be in a nearly rest state with minimal, near zero change in displacement. This is one of the most important theories.2. Big Rip - Phantom energyThe density of dark energy increases, resulting in the rate of acceleration of expansion to also increase. As the hubble constant increases, eventually all matter, down to sub-atomic particles, will disintegrate into smaller and smaller particles until eventually the composition of the universe will be streams of elementary particles - caused by (phantom) dark energy.3. Big Crunch - Big CrunchThis is based on the average density of the universe - currently it is sufficient for it to enable the universe to continue to expand, but a certain point the expansion will reverse into contraction as all matter is brought towards a point that may resemble a singularity.This could lead on to some interesting events - such as a cycle of: Expansion > Big crunch > Big bang > Expansion > Big crunch > Big bang, and so on - Cyclic model / Oscillatory universe4. Continuous expansion - Accelerating expansion of the universeIn this theory, the universe continues to expand at an accelerated rate - in the sense that for an observer a distant object will continue to move away at an increasing velocity over time.In GR, an accelerated expansion of the universe can be attributed to a positive value of the cosmological constant Λ,In conclusion, all are relevant and important theories. There’s many more theories to read up on, although I decided to cover just a few of the ones I know of.Hope this helps.

What is the most likely scenario for the eventual demise of the United States as a global power?

The most likely scenario is that the US is eclipsed by those two giant Asian nations, India and China.  The US has just over 300 million people and is growing ever so slowly.  The US is a fully industrialized nation and can only grow its economy through innovation, a very difficult process.India and China each have over 1 billion people.  Half of the world lives in Asia and over half of Asians live in India or China.  The per capita income of each nation is a small fraction of the US.  Once either nation has a per capita GDP that is larger than 1/3 that of the US, they will become the largest economy in the world.  They will likely continue to grow from there, eclipsing the US.  In the 1990s, the US had by far the largest economy while #2 Japan had only 100 million people and not growing.  #3 Germany had even fewer people, around 80 million and little growth.  With smaller populations, it was unlikely Japan or any EU state would surpass the US in economic and military power.  However, the US is a small country compared to India and China.  Combined they have about 7x as many people as the US, and have lots of room to grow their economies to catch up.With a large economy and a large population also comes the ability to produce a large military.  Britain was the most powerful nation in the 19th C because of its large military.  Eventually it was eclipsed by the US, and then when the US saw the need, the American military surpassed the British.   The Chinese will probably be more likely to build a military to rival the US, which will end America's global hegemony, starting with East Asia.  Eventually, China's one child policy will catch up with them and India will surpass them in population.  They are on the same economic growth path, and so India is the most likely largest economy for the mid-21st century and beyond.  India does not have a large military capacity, but that doesn't mean it won't develop one over time.

What is the most likely scenario for World War 3?

WW3 is most likely to occur first in South East Asia, particularly in the Spratlys in the Philippines and the Pinnacles in Japan, If some cases, China, North Korea, and Russia would sign an alliance together to declare their Agendas, In China on the Spratlys and Pinnacles, North Korea on the South, and Russia in the Baltic Regions. Also, If the Chinese Navy attacked the Spratlys, It would pull America into war, Which was noted on the mutual defence treaty with the Philippines, Moreover pulling the Japanese into the war for attacking the Pinnacles, Making a huge conflict on the South China Sea. Also connections and contacts between the formal allies is most likely to b cut off. If War on South China Sea did broke out, Canada would also aid America in very little ways.In Europe, which most of America’s allies are home to, Would sign a pact that includes France, Germany, Britain, Switzerland, Italy and Poland in case Ukraine, Belarus,Serbia, Romania, Bulgaria, Croatia Kosovo,Moldova, and Greece is ever invaded. To put these in Perspective, this would be the same scenario, wherein Germany invaded Poland in which announcing WW2 in Europe.In Arab Nations and Central Asia, which most of Russia’s allies are home to, Would sign a pact that includes Turkey,Pakistan, Kazakshtan, Tajikistan, Turkemenistan, Uzbekistan, Kyrgyztan, Syria, Lebanon, Iran and Iraq against Israel, India and Sri Lanka which would unlikely sign a pact together. Egypt would also join the pact which would be the roots of an African Civil War releasing their own agendas of communism.Cuba would also join Russia, which would cause a Great Carribean War

What do you think is the most likely scenario that will end Donald Trump's presidency? (ex. Amendment 25, resignation, etc.)

A lot depends on what Mueller has, and that report could drastically change the outcomes but, as it stands now, several scenarios are possible, listed here from least likely to most likely:He is exonerated in any wrongdoing, continues as president and is perhaps reelected for a second term. This is highly unlikely, given how profoundly damaged his presidency is at this stage and with evidence mounting daily of his complicity in various illegal acts.His administration invokes the 25th amendment and Congress removes him from office. Also highly unlikely, as such a removal must be approved by a two-thirds majority of the House and Senate. Given the profound spinelessness, obsequiousness, and cowardice of the current Republican majority, that would never happen even if Trump stripped naked and started doing the Macarena at the State of the Union address. (The next day Republican leadership would release the results of a Koch Brothers-funded study showing that naked public Macarena dancing is good for the economy.)He is impeached for high crimes and misdemeanors, convicted by Congress and removed from office. A better possibility but still a long shot given the aforementioned cowardice of the current Congessional majority. A much better reality if Democrats take the House and Senate back.Somehow, the people closest to him convince or force him to resign before he becomes the first sitting U.S. president to be taken away from the White House in handcuffs.Trump is just too dumb to see the walls closing in on him, and because he can't keep his mouth shut, he is painting himself into a corner tweet by tweet. Nixon resigned because he knew he could not win an impeachment trial. Perhaps, just perhaps, if Trump sees an angry and vengeful blue wave coming for him, he'll resign and leave the country. But I wouldn't hold my breath.

What is the most likely 100-year scenario for global warming?

I think it's not possible to really know, but my guess is we'll get 1 degree of warming and a few millimetres of sea level rise, which will result in very little in the way of actual change. Rising CO2 (which we will fail to check) will slightly increase crop growth; droughts will be more frequent in some areas and less frequent in others, reflecting the pattern we've seen so far. The IPCC gives a range of estimates from 0.3C to 4.8C:"The increase of global mean surface temperature by the end of the 21st century (2081-2100) relative to 1986- 2005 is likely to be 0.3°C–1.7°C under RCP2.6, 1.1°C–2.6°C under RCP4.5, 1.4°C–3.1°C under RCP6.0, and 2.6°C–4.8°C under RCP8.59"(The RCPs here are various scenarios for greenhouse gas emissions and land use etc; RCP2.6 is very unlikely to be realised, so their estimates in fact range more towards the upper end).Page on www.ipcc.chBut seeing as they also say that the majority of computer models have overestimated change in the past, I'm not convinced their models that predict an alarming maximum of 4.8 C are working properly now, either.Net cooling would not surprise me either ...

What is the most likely scenario for first contact with an alien civilization?

Alien contact is what is sometimes called a “black swan” event. A completely unforseeable event that, in retrospect, seems inevitable. The black swan was a character in Swan Lake; it was a figure of fantasy. Of course there were no real black swans. Until we went to Australia and found black swans. Then of course it was obvious that we would someday find black swans. The internet is such an event. Not a single futurist predicted the existence of the Internet until it already existed, and yet once it became a part of everyone’s lives, we retroactively made it an inevitable outgrowth of our telecommunications revolutions going back to the telegraph and the postal service.If and when we do make contact, however we manage it will be seen historians of the future as the most likely scenario. That said, there are a few things we can expect not to happen, prime among them, the whole “White House lawn” thing. Aliens capable of interstellar travel are about as likely to land on the White House lawn as we are to invite an uncontacted Brazilian tribe to the UN. Even if they planned to exterminate us, they could do it without leaving their home planet. They won’t make themselves known to us until we pose a threat to them. And even then, contact will likely initially be through telecommunications.For me, first contact will most likely occur through the “Stellaris” method: we develop interstellar travel (either faster than light or fast sublight) colonise a few systems, and then bump into the outer territory of another race. But that’s just a hunch.

What is the most likely scenario for a world war in the next decade, assuming one will happen?

This is how I believe it (could) happen:2019: Russia develops some new weapon system. World leaders start to get worried.2020: After months of promising to defend America against Russia, Donald Trump is reelected. (You know this was coming, didn't you?) He promptly proposes declares war on Russia without the consent of the UN.2021: UN leaders are split over President Trump’s rash actions. The US is ejected from the UN. (Just roll with it, OK?) Countries start getting antsy and start pull of the UN. The UK and Germany try to hold things together but it is clear it will not work. The UN, followed closely by NATO, dissolves late in the year.2022: Russia destroys the White House with their new weapons system (orbital satellite missile system?). The US launches missiles at Russia from submarines in the Black Sea. Russia launches missiles at the US from submarines in the Gulf of Mexico. North Korea launches landbased missiles at Japan. South Korea invades North Korea. China invades Japan. Russia attempts to invade China but are stopped in the Himalayans by guerilla fighters. Germany, France, and the UK amass on the edge of Russia. China declares war on the US. China launches the first nuke.2030: World War 3 ends. The US, China, and Russia are devestated from 7 years of bombings. 2.2 billion soldiers and citizens have been killed. Donald Trump has been eaten by wolves. The majority of Europe and Asia has been irradiated and has been unfit for living. The rest of the world starts to put the pieces back together. New nations form. Eventually, the world gets back on track.(I apologize for the abrupt answer, I didn't have much time to write this. I also apologize for any grammatical errors, as I wrote this on a phone.