# Tag Info

238

They weather. https://www.livescience.com/18343-seal-mummies-antarctic-microbes.html Antarctica has dry valleys where, for some reasons, seals sometimes went. It is a bad place for seals, and they died. It is a bad place for microbes and everything else too, so the dead seals did not decompose. These mummies are hundreds of years old. The mummies ...

206

Assuming that it's purely random, let's consider where these people would probably be. Taking the percentage of the population each country represents, we get: China: 18.2% = 6.37 people India: 17.5% = 6.125 people America: 4.29% = 1.5 people Indonesia: 3.43% = 1.2 people Pakistan: 2.78% = 0.93 people ...etc. The percentage keeps going down. This means ...

192

It's HF radio, or nothing The odds of anyone meeting again are almost exactly equal to the odds of at least two being either radio hams, or able to learn the skills from books. The population density of 35 people worldwide is so extremely low that the odds of finding someone without the benefit of global communications is practically zero. Strategies like ...

143

The ocean is a dynamic and very large place, so it's unlikely to have many large-scale effects unless humans overreact. I'll focus on the local, immediate effects of this saucer from a physical, biological, and chemical perspective. Some things to consider about the location of the saucer- it's suspended in the middle of the Atlantic Ocean, almost directly ...

127

The remains would mummify, petrify, erode, and eventually become just another mineral layer. Where water is available the organic remains will dissolve and be replaced with inorganic minerals to form fossils, and if no water is available the remains will desiccate and be preserved as mummies. There wasn't much specification regarding the timeline or ...

112

Not with the time constraint given. Let's start with the most destructive thing we've got: nukes. There are about 15,000 nukes worldwide, of varying yields. Sources: World Nuclear Weapon Stockpile, Plougshares Fund, 2018 Federation of American Scientists, 2018 Assuming an average yield of 200 kilotons, which is what most US nukes have, we could assemble ...

110

The maximum height a mountain can have on Earth is a tad more than what Mount Everest is high. This is due to the fact that when you increase the height of the structure, you are also increasing the load. After a certain point you will be adding too much weight for what the material can sustain, and the entire structure will crumble on itself. The potential ...

107

Natural Vaccination. Read about how Cowpox was used to vaccinate against Smallpox, this is our IRL first instance of vaccination against a disease. The word “vaccination,” coined by Jenner in 1796, is derived from the Latin root vaccinus, meaning of or from the cow. Once vaccinated, a patient develops antibodies that make them immune to cowpox, but they ...

94

All the info we need to calculate this is in the wiki for the oxygen cycle. The atmosphere gains and loses about the same amount of oxygen each year: 3 $\times$ 1014 kg. It also currently holds 1.087 $\times$ 1018 kg (34 $\times$ 1018 mol converted to kg). So we could, back of napkin, last 3,000 years. In reality we would either die much earlier because not ...

92

I can imagine battlefield logistics would be much easier. One of the most dangerous and common tasks for infantry is shuttling supplies back and forth between the front lines and the forward camp. If you could load up a huge pack with crates of ammunition or even vehicles, the "runner" could transform into a T-Rex, run the munitions up to the front, and ...

91

One day. Few at most. In most modern countries death reports are passed to government agency on daily basis. Clerk responsible for them would be surprised that there are none in his area. He will notice sudden drop, and 0 in one category. At least some clerks would call their counterparts in adjacent areas to chit-chat about this impossible coincidence, and,...

85

As @Thucydides mentioned, researchers posited a similar magnitude of impact and thought they had found evidence for it, though they later retracted their findings they did calculate the potential effects. The team, from the Southern Methodist University in Texas, analysed more than a million earthquake reports, looking for the tell-tale signal of ...

83

As a native I'm definitely biased here, but Ireland is actually a pretty good bet. Especially towards the West, Ireland has actually seen a decline in rural population. You can genuinely walk for miles and see no signs of civilisation. I'm talking even the grass has no footprints. Predators? Ha! St Patrick took care of our snakes, and our beloved English ...

81

All the people who said "We all die!" are correct with good answers, but for most people it won't be the earthquakes that kill them -- they'll already be dead. The leakage from the radiation beam will be large enough to fry pretty much everything. As it cuts through the atmosphere -- even before it hits the ground -- it will scatter a huge amount of energy, ...

80

Because some self-proclaimed health guru claims that it's good for you to have that disease. The miracle-virus causes your body to absorb free cosmic energies. Your constantly raising body temperature is proof that it works. The headache you feel is because your brain is reconfiguring itself to become more effective. When the process is over, you will be ...

79

First of all they should only teleport things, not people. People talk. Otherwise, they're in the shipping business. They should use their teleportation ability to mimic real world transportation so as to avoid any suspicion. For example If they are supposed to teleport something from A to B that it would take a month to get to B then they should still make ...

79

You've already accepted an answer, but aside from the structural issues (and the sheer mindboggling amount of energy it would take to pump all that water up that high), there's another misunderstanding: allow a train running on a train track going up the cone to escape earth's orbit? Getting into orbit isn't simply a matter of getting up really high. ...

77

310 Km/h is 86 m/s. This means that on your 250 meters track (for acceleration), you'll have a mean speed of 43 m/s, meaning that you'll reach your 250m in 5.81 seconds. Now, 86 m/s reached in 5.81 s is 14.8 m/s², or about 1.5 g (same for deceleration). Maybe not really comfortable, especially for "regular" people not used to this kind of acceleration during ...

77

Even the satellites and every sensors on Earth were returned to that exact moment and this only affects the entire region of space up to orbit of moon (...) Everything above the Moon will seem to have changed position instantaneously in a very weird manner. All the signals picked up by the Deep Space Network will be coming from the wrong places. Solstices ...

74

Think Small Instead of moving items very large distances; why not move them small distances; it's not like you get paid per mile. You could almost entirely remove the equipment cost and drastically increase the speed of repairs for things like large trucks, ships, and even in-place mechanical repairs on large machinery systems. Instead of needing an ...

68

The first thing that it's important to understand is that evolution is a by-product of natural selection, not the driver of it. That is to say, every change introduced by DNA combinations and mutations over time is (more or less) random, although the selection of which will become more common over time is not. Ultimately, the most important factor in the ...

66

It depends on how far from the current production possibilities frontier this technology is. There are several possibilities, depending on the technology gap: It is like the Apollo Moon mission to Stone Age hunter-gatherers. We (the hunter gatherers) can probably recover some debris, use it to bash stones or store berries, but we have neither the industrial ...

66

The problem your going to have in any open sky area however, is the familiarity of the moon and constellations - a dead giveaway that your still on earth. To that end, I'd suggest the best place for this scenario would be a large underground cave system, like Reed Flute cave in China:

65

No. Most of the preceding responses have overlooked one relatively-recently identified home for life on the planet; within the crust itself. Researchers have found bacteria up to 4 kilometers down in continental crust and 2 km beneath oceanic crust. Recent estimates are that up to 70% of the microbial life on the planet is, in fact, in the deep biosphere. ...

64

No. On this scale, the Earth is not solid and rigid. It's more like extremely hot jello, with a thin and weak crust, a layer of hot floppy jello, the "mantle", a liquid outer core (actually molten iron) that's about 1,400 miles thick, and an inner core of iron about 750 miles in radius. Films and TV programmes that show journeys to the centre of the ...

61

No, but... If you restart evolution, you would end up with new species. But some of their features may be very similar to what we know in our world. The Nobel Prize winner Jacques Monod said that evolution is based on chance and necessity. According to him, there is no final causality that would lead evolution towards a specific goal (like creating Humans ...

60

This place cannot have any obvious life forms. Nothing too complex (Small microbial creatures are fine) No humans for at least a few hundred miles, and no signs of their presence. Must be somewhat hostile to human life Cannot be underwater Inland Antarctica seems to satisfy all the above: Doesn't have obvious life form, not animal nor vegetal,...

59

The CDC estimates 187,000 people in the USA die from "injury" every year -- basically that includes homicide, suicide, vehicle accidents, and other forms of accidental death. This works out to a chance of about 1/1600 of an individual dying from injury in any given year. So the chance of survival is 0.999375. After 300 years, your chance of remaining alive ...

58

Given your obvious technical advantage, I would recommend under the ocean. This has several benefits: Immune to satellite imagery. As long as you get down successfully, you're pretty much set on the undetected front. Due to human biological limitations, the ocean is largely unexplored. We have imaged most of it, but not necessarily with great detail or ...

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