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It is a common misconception that something in (Low Earth) orbit (like the ISS) is far away. This is not the case -- orbit is more about going sideways really fast than it is about "being up". (xkcd -- Orbital Speed) The ISS has perigee at 402 km and apogee at 409 km ([1]). Unless you're further north / south than 51 degrees (The ISS' orbital inclination), ...


174

No, rivers and other land-based sources account for 10-12% From Wikipedia: Sources of ocean-based plastic pollution Almost 90% of plastic debris that pollutes ocean water, which translates to 5.6 million tons, comes from ocean-based sources. Merchant ships expel cargo, sewage, used medical equipment, and other types of waste that contain plastic into the ...


94

The claims are two wrong, one sort of correct Before we start, it might be worth noting though that a strong magnetic field is more likely to keep radiation out than letting it in (*). Anyway, the Earth's magnetic field at the surface, measured in nanotesla, and sourced from here. The image below has the locations in question marked with yellow stars (thank ...


56

As the question demonstrates, the actual definitions used are unclear, and there could be many possible answers. Chapter 3 of the Nordregio's 2004 report for the European Commission, Mountain Areas in Europe: Analysis of mountain areas in EU member states, acceding and other European countries provides a number of different measures, most of which Spain is ...


36

A picture gives a sense of proportion. To the Earth, a rock diameter 13000km, clings a wisp of atmosphere. The troposphere, where everyone has ever breathed, is thinner than 20km. Above, space. The Internal Space Station orbits at about 400 km. THE THIN BLUE LINE: Earth’s thin atmosphere is all that stands between life on Earth and the cold, dark void of ...


31

These rankings are all a matter of what counts and what doesn’t. For examples, I’ve constructed three similar rankings, each one a little stricter—which forces out some contenders, and gives those below them that are still left higher rankings. This way we can see how Rub' al Khali can be largest in one ranking, while larger-still deserts are found in the ...


30

The Arabian Desert is not only a sand desert All sand deserts are deserts, but not all deserts are sand deserts. And you do not call an entire desert a sand desert just because a part of it — in this case only 1/5 of the total area — is a sand desert. This is a desert. The image is taken at the Dome C Station in Antartica (image source) The Arabian ...


22

Nearly True This works, but there is one detail missing, and depending on your latitude the picture could be misleading. The sun moves approximately one finger width across the sky each 15 minutes, but the sun does not necessarily set vertically down onto the horizon. You have to use your hand to measure the distance the sun has to travel along it's path, ...


22

If the question is about those specific countries: No, plastic in those rivers can have come from a different country. ..Therefore, the rivers might be Asian/African, the plastic is not (therefore, the responsibility of it being recycled does not fall solely on those countries). MichaelK's answer is excellent. I would just like to add the fact that there ...


21

The current night sky as seen from Nairobi, Kenya (1°17′ south latitude) and from Darwin, Australia (12°27′ south latitude) are shown below. Nairobi, Kenya night sky: Darwin, Australia night sky: Sources: https://www.fourmilab.ch/cgi-bin/Yoursky Nairobi, Kenya is just south of the equator, so at the right time of the year (this is the right time of the ...


21

Close Enough The claim is from 2015. Canada in 2016 had a population of 35,151,728. Looking at the 2016 population for Census Metropolitan Areas in Ontario, Quebec and Nova Scotia in that area with over 100,000 population... Toronto 5,928,040 Montreal 4,098,927 (some of the Montreal CMA is above the line, someone could dig into the individual Census ...


16

To answer your question, "Is there a place in the world where two oceans meet and they don't mix?" No, the water mixes it just isn't instantaneous. Saline, temperature differences, and pollutants can cause them to appear as if they don't mix for a period of time, especially if there aren't strong currents. According to Ken Bruland, a professor of ocean ...


15

It seems the OP jumped the gun by writing a draft of the post and sitting on it, and then posting the question without checking up on the old video. AJ+ has deleted that video and put up a new one, which apologizes as follows: The internet, AJ+ included, got this story wrong: Google did not remove Palestine from Maps. It was never there to begin with. (...


13

The authenticity of the document itself does not seem to be in question - no one seems to deny that the map dates to 1513 and is the work of Piri Reis. See Description of the Map - Page 8 of the available online sample. The question is regarding the authenticity and accuracy of the antarctic coastline depicted in that map. The nexus of the dispute can be ...


11

A similar type of unexpected large sound, the Seneca Guns or Barisal Guns, has been recorded for centuries. While there is no firm explanation, they are believed to be the result of the atmosphere unexpectedly magnifying loud sounds, such as thunder, ship cannons, or, yes, heavy machinery. While it is not clear how this hypothesis could be tested, most other ...


11

I am asked to interpret satellite and air photos on a regular basis for my job and sometimes for the press. People spot things in them all the time and almost always misinterpret them. A funny one recently was the Nazi South Pole interpretation of a location in Antarctica. Actually the shape is quite similar. Imagery from planes or satellites is often off-...


10

Table 5.1 of Aeolian Sand and Sand Dunes lists all sand deserts (ergs) that are larger than 12,000 km2. The second largest at 560,000 km2 is Rub' al Khali. The largest at 630,000 km2 is the Great Sandy-Gibson Desert. The book also states "The largest of the Saharan ergs is the Erg Chech in southern Algeria, which has an area of 319,000 ...


10

The calculations leave out important factors as to why you can still see things lower than 300 feet. This is a replication of the Bedford Level experiment It's a well known, classic experiment done many times that is in no way shape or form "theoretical" If light traveling through the earths atmosphere actually moved in a perfectly straight line ...


8

With regards to this question, How come arabs be so verbose in the field of chatting and be so unproductive in terms of internet content? a possible answer comes from this sentence in the IWS site: Indeed, many people are bilingual or multilingual, but here we assign only one language per person in order to have all the language totals add up to the ...


8

Most likely true There is little doubt that first 3 languages are English, Chinese and Spanish. The contestants for number 4 spot would be: Portugese Russian Hindi Arabic If you look at number of internet users in each country as estimated by United Nation's International Telecommunication Union, you'll find that: Arabic countries total about 153 ...


6

The article in question messes around with the geography quite a bit. Areas that are climatically and geographically very different are handled under the same label, which is kind of nonsensical. It is true that there some parts of Slovenia which "can receive between 2000 and 2500 mm of rainfall per year". Here is a map showing the corrected annual ...


4

From the A Far Northern Landmark Sydney Mail 24 April 1935: COOKTOWN, Queensland's most northerly town, which for nearly half a century has been one of the 'ghost' towns of the far north, is booming once again. An army of timber-getters is at work removing the trees from 100,000 acres of Crown lands in the little-known country south of Cooktown, and,...


4

The numbering system is sequential. It is not a measurement system for land area. The scheme requires that I-80 is farther north than I-10, I-20, and so on. But it does not prescribe that I-80 be a specific distance north of I-10 for land-area-measurement. Interstates are very roughly evenly spaced because of the places they connect. The federal ...


4

Partially. The locations of Roman roads are still linked to higher prosperity today within Europe, but not the Middle East and Northern Africa (MENA). This would be expected, if the usage of these roads contributed to today's prosperity. While MENA also had Roman roads, wheel-based transport was abandoned in the early middle ages in MENA - likely because ...


3

A quick Google search gives Angkor wat: 13.4125° N, 103.8670° E Great pyramid of Giza: 29.9792° N, 31.1342° E So they differ in longitude by 72.73° Easter island is at 27.1127° S, 109.3497° W Which is 140.4° West of Giza. So, not that close to the supposed exact values.


3

Eratosthenes of Cyrene (Wikipedia) My man Carl Sagan tipped me off to this one in the Cosmos. If you haven't seen it, go watch it now! Youtube! Free and available to everyone because he was a beast! I do think it was a generally accepted concept among those who cared to think about it before Eratosthenes, but he gets the credit for proving it.


2

No this is just wrong. Look for example at this picture in this link where they mapped some the ships which sended some AI signal (and these are not all ships airplanes island): http://www.n-tv.de/wissen/Satellit-ortet-52-000-Schiffe-article13864231.html Can you find a circle with 400km radius without any dots in it between 51 degree north and south? I ...


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