Recent comments in /f/explainlikeimfive
ExBx t1_je7ehbx wrote
Reply to comment by johntheflamer in eli5 What do blood labs do with your blood after they have tested it? by ratboy_r97
That's what the vampires want us to believe.
[deleted] t1_je7e2k5 wrote
[removed]
rocima t1_je7cr6d wrote
Reply to comment by Abba_Fiskbullar in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
And the Parthenon probably only survived that long because it was protected by being turned into a church in the Christian Roman/Byzantine empire & then a mosque under the Ottomans.
It's not a coincidence it's the biggest surviving structure (despite the explosion) on the Acropolis, the other buildings will have been demolished.
nellirn t1_je7cpqo wrote
Reply to comment by johntheflamer in eli5 What do blood labs do with your blood after they have tested it? by ratboy_r97
Its the same thing with body parts that are removed in surgery, like an appendix. It is sent to the lab, tested, then when they are done with all the testing, it is sent for incineration.
johntheflamer t1_je7c7gv wrote
They burn it. They either have machines of their own to burn it, or they hire a medical waste company which will burn it
rosebudd_ t1_je7c6pj wrote
Reply to comment by Keepinrealtruth in eli5: How does GoodRX (or any prescription savings group) work? by fourtwenny2389
I pay $18 for a vial of Testosterone compared to $119 retail price lol. I'll give them all info I got plus all my darkest secrets if they want at this point
rocima t1_je7c3pk wrote
Reply to comment by Cycleguy57 in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Most of them were. In the center of Rome only a few examples survive. The rest of that city of one million people was torn down to build the medieval city, or the Renaissance city or even the Baroque city. If you know where to look, later Roman buildings are full of scraps pillaged from Ancient Rome (including much of the lime used in the building mortars: made by burning ancient Roman limestone & marble!)
bloodmonarch t1_je7bxkt wrote
Reply to comment by Malikhi in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Was she the OG "nanomachines son"?
-PS5 t1_je7bjb3 wrote
Reply to ELI5 Why do tidal waves or tsunamis in real life not look like the huge waves in the movies? by ColonyLeader
That's because the movies are unrealistic!
Tsunamis have really long wavelengths (100s of km). For a wave to break, they must reach a height that is 1/7th of the wavelength. That would require a height of 10s of km to break. Obviously that does not happen, so tsunamis do not become breaking waves and instead roll up on shore.
A breaking wave is much for dramatic so movies opt for that
rocima t1_je7b9dj wrote
Reply to comment by mvdenk in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Or sometimes the opposite. I've written a longer comment in this thread mentioning that as Pagan temples fell into disuse in Ancient Rome as the empire rapidly Christianised, the authorities kept promulgating laws every twenty or thirty years against despoiling the old, pagan buildings (apparently they were good tourist attractions!). However, making new laws means that the old laws weren't working. And this was mainly that the older structures were too convenient as quarries of ready dressed material to reuse in new buildings - churches especially, but also houses, palaces, fountains - you name it. Especially as the older Roman infrastructure & huge slave numbers were declining rapidly.
Only the sanctity of a few holy sites saved them - for a time: the Pantheon became a church (but was still stripped of its Roman bronze doors in the 17th century) and the Colosseum (a martyrs' shrine) survived pretty well till the 16th century when the Pope no less gave his nephew permission to demolish a large part of it to build a suitably enormous palace.
dfreshv t1_je7b54b wrote
Reply to comment by Hisei_nc17 in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Man, people say drugs have only gotten stronger over time, but the ancient Greeks were on some shit.
JohnnyWadd23 t1_je7aodu wrote
Reply to comment by sethguy12 in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
The NSA can crack almost anything, especially with help from the Mosad Pegasus technology. The US govt has weaseled it's way into these companies producing the end to end encrypted apps.
For example, we recently discovered FBI agents working at Facebook and Twitter. Facebook bought WhatsApp so the FBI working there got its hands on the decryption keys for WhatsApp messages. So they started reading everyone's messages. For example, Chase employees were using it to coordinate efforts to get around regulations. Once the messages were read the SEC stepped in and fined Chase. The SEC had no case without facebooks help decrypting the supposed private messages.
Fred2718 t1_je7a4yf wrote
A more complicated, related example is how WW2 fighter aircraft machine guns were aimed.
There might be, for example, four guns on each wing. The aiming reticle is in the cockpit, between them. The whole shebang is adjusted so that the bullets from each side converge (for example) one hundred meters ahead of the plane, and the aiming reticle points at that spot. This adjustment has to account for the angles from left and right, as well as the bullet drop, and air drag at a particular airspeed.
Like with the rifle scope, the pilot's aiming reticle has extra marks on it to allow aiming at other distances, and especially for leading a moving target.
grandlizardo t1_je79lba wrote
Reply to comment by Korberos in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
Let’s add this to the grievances about the Armenian genocide…
WVPrepper t1_je79her wrote
Reply to comment by Slypenslyde in ELI5: I buy $5,000 worth of stocks. Each stock is worth $1000. Suddenly the stock drops and each stock is worth $1. My portfolio is valued at $5 now. I sell. Where did $4995 money go to? by figurine00
I was curious to see how someone would explain it. This is great! Saving to share with my son.
rocima t1_je79fpu wrote
Reply to eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
In Rome the old buildings served as quarries for later buildings- especially Imperial buildings were demolished in the resources-starved medieval period. From the earliest period of Christianity in the Roman empire, the collapse of support for pagan religions meant the temples were neglected and started being pillaged for their decorative stone especially - the bulk of the coloured marble in Roman churches dates from imperial Rome (in the older churches in Rome, most of their often mismatched columns have been taken from older pagan temples) Ever noticed a lot of churches have large disks of coloured stone set into the floor or walls - sections sawn from pagan Roman columns. Marble was burnt to make lime for mortar. We know this was an on-going problem as the authorities from the 4th century onwards kept writing new laws to stop it from happening, as previous laws were clearly not working. So the ravages of time which brought the buildings of imperial Rome low had two legs & hammers, chisels and wheel barrows.
A few buildings were protected as holy sites - the Colosseum survived reasonably intact for a long time as it was a martyrs' shrine, but in the 15th century special permission was given by a Pope to his nephew to take a lot of stone from it to build the ginormous Palazzo della Cancelleria.
Moving large blocks of stone, especially on land, is really difficult in a pre-modern period. Most of the best marbles in Rome came from Asia Minor by boat in the Roman period. Once there was no longer the infrastructure - or the slaves - to move stone, people just grabbed it from the nearest empty building, the temple of whatever. Lots of the older, medieval buildings in the ghetto in Rome have architraves, bits of columns or statues embedded in them, and are probably built with stone & lime & rubble hacked from older imperial Roman structures.
Even Bernini's Four Rivers fountain in Piazza Novanta "re-uses" (that's the correct technical term) travertine blocks from the Roman Circus that used to occupy the site (you can see an excavated space at the North end of the piazza that has a section of the original Roman structure about 4m below current ground level)
It's a fascinating & complicated subject. Some buildings in the center of Rome incorporate stone from all major periods of history: medieval base with inserted Roman decoration, next floor a Renaissance logia, then Baroque window frames, all topped by an illegal 1970s cement terrace.
clocks212 t1_je77yr5 wrote
Reply to comment by throwaway_lmkg in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
Keep in mind all major governments are sucking up that encrypted communication with the knowledge that one day the encryption keys will leak or the encryption can be broken or brute forced. If you’re a political dissident in China for example I wouldn’t count on that encrypted data to be encrypted forever.
[deleted] t1_je77gy5 wrote
BiomeWalker t1_je77f0c wrote
Reply to comment by Zharken in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
Yep, that sums it up pretty well.
Zharken t1_je7705e wrote
Reply to comment by BiomeWalker in ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
oh so I give you a key that everyone can see, but can only be used to encrypt, and I have a different key that no one knows that I can use to decrypt what you return to me and vice versa
X7123M3-256 t1_je7696d wrote
Reply to ELI5 Why do tidal waves or tsunamis in real life not look like the huge waves in the movies? by ColonyLeader
> Could a wave actually get that high and make it to land?
Yes. But these aren't tsunamis.
Tsunamis are as damaging as they are not because of their height but because of their length. A tsunami can have a wavelength of hundreds of kilometers, so there is a huge amount of water behind it unlike a normal wave that breaks and dissipates when it hits land, a tsunami behaves more like a rapidly rising tide (hence why they're sometimes known as "tidal waves").
Note that tsunamis triggered by landslides rather than seismic activity can be much larger. In 1958, a landslide in Lituya Bay, Alaska, triggered a megatsunami that caused damage 524m (1719ft) above the waterline. This is higher than the Empire State building. Such an event has, as far as I'm aware, never been filmed, so who knows what it would look like.
AnApexBread t1_je74zjq wrote
Reply to ELI5: When a third party app says they offer "end to end encryption," what does that mean? by [deleted]
In short it means that only you and the person you're talking to are able to read the message.
It goes directly from you to them without passing through any servers or anything in-between which can read the messages.
Twin_Spoons t1_je74en1 wrote
"Entertaining" usually means some event that you put effort into organizing. You invite the guests ahead of time, make some food, and often have a focal activity (watching a movie, doing a craft, gift exchange, etc.)
explainlikeimfive-ModTeam t1_je74c6v wrote
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RenterGotNoNBN t1_je7grtq wrote
Reply to comment by Korberos in eli5 why ancient historical buildings haven’t been kept up? Why are buildings like the Parthenon and the Colosseum in such disrepair? Greece and Rome/Italy have existed the entire time? by PickledSpace56
That's not the reason it was built - sure it commemorates the victory - but I heard a theory that it was used as a kind of show of wealth to underpin their economy - like a modern central bank.