Roamer

It wouldn't be "humans communicating with aliens" it would be "aliens using their high-frequency-brainwave-beam-device" to communicate with humans

That's like saying people should eat shit so they discuss the taste, instead of offering them a banana whose taste they can discuss without getting sick.

1) sure they thought of that, just do a google search, often a camera is attached to a helmet or put on a gun. 2) seems a bit impractical compared to just bombing the enemy, or having armored vehicles present(some of which are quite light and can be transported through air) or just dropping a barricade would also be a good idea; you don't expect soldiers to get fired on from all sides

We still don't need to, btw, since we have computers.

so it's workers are gonna be bees & ants ?

He's got a point though, black holes are much more attractive then crosses and figurines, especially if you get too close.

A mutation IS a change in genetic material.

your pictures aren't showing. Also, since when are marshes worth money ?

Exactly how many nuclear bombs have you got in your shed ?

you should be able to edit code after running. you re probably using a compiler which changes the code so it can be run, best to make a back-up before running/compiling, or figure out what turbo c+ exactly does upon running.

By what measurement ? As i see it, we 've had little to no use to them, and they 're often poisonous, more harmfull then helpfull, which is enough for any negative reaction to evolve: in evolution a reaction is only "excessive" when it is disadvantageous.

Not unlikely, i was thinking more affordable clothing.

It looks like a sequence of which only one member/instant has been posted. If those are two instances i 'd either go for 3,21 or for 3, 30(though 3, 30 seems too simple)

bodies repair themselves, medical science can support this process, for example with healthy nutrition, which is already available for those who look for it.

Or maybe the cat has me ...

For the same reason(s) people nowadays want to be buried or cremated upon their demise.

I don't have a cat but occasionally a neighbour's cat comes along whom i then feed some yogurt.

bingo. If you're going to use movies to learn about real space-travel, then you've got a bumpy road ahead of you

We don't need high metallicity, we need easy access to the basics (air, water & food) only after that we have use for(want) other resources for development and export, which could be metals but also plastics or rare materials.

Somebody actually died, seems worth investigating in my mind. Sure, it might be more about clearing reputation then trying to put the suspect in jail, but, in the end, as long as the judge does care about the suspect's guilt or innocence, justice will be served. Would you prefer a situation where cops who killed someone(whether by gun, taser or bare hands) would get off because "cops can't be criminals" ? My guess is that the cop will be found innocent as he's a cop and not a shrink, faced with a mentally unstable person he did everything that could(should) be expected of any cop.

@mistermack; If you're going to divide people in "100% free people" & "slaves"" then you're right, and then we had slavery at least up to ~1991(Soviet-Union). For a more nuanced view; serfs belonged to the land, and it wasn't as much that they weren't allowed to leave, as it was that other lords weren't allowed to poach them for their own. They had rights, which slowly increased, and the abilitie to rebel(albeit not always successfully) Historically, the medieval times(or dark ages) were a time of upheaval and survival, the old (Roman) system had fallen and anyone not able to protect his own was bound to go under, the new system was made on-the-spot everywhere, based on what was there previously(both tribalism & civilization, but also on both slavery & coöperation) the rights of individuals were details that had little priority for rulers, but the basics(like rights & obligations come together) were understood (at least by the more competent rulers) @Externettrade without the medium of money is called bartering. I suspect most craftsmen working in a castle were just paid in food & shelter with some luxuries(like more clothes)

There wasn't that much gold available, so widespread capitalism wasn't viable(yet). And there wasn't much slavery neither btw, it died out with the Romans.

The main-currencies in that time were food & protection, I assume they kept any gold they had in a chest

@koti nice vid, but he's missing something; the reason to think alien civilizations exist somewhere is that the universe is so vast(you throw the dice often enough, you're bound to get a six eventually); if any alien civ is a million year ahead of us, but they 're more then a million lightyears away from us, we couldn't ve detected them yet.

To me those three studies suggest that plants work, just not as strong suspected, and that they are easily overwhelmed; in the first one they used an outdoor air dampening ventilation system, which was apparently surprising to some to overwhelm a rather low concentration of plants. The second and third studies are more interesting, as they suggest that another ecological factor would overwhelm plants in small concentrations, especially the third showing (random) increases and decreases at higher concentrations, suggesting even bacteria have a stronger impact on the air then plants in low concentration. These were practical/in the field tests btw, not in-a-closed-lab-tests, and regarding the opening post @fresh, if i lived in a heavily polluted area, i would definately get a lot of plants and keep my windows closed.