I've seen several PoliSci and game theory professors play similar games with the class. I've had one that would offer to give everyone a perfect score on the final if everyone turned in a blank test, or would make the blank people take a harder version if one person didn't. He's yet to have a class actually pull that off. I've also had a professor that would demonstrate various games with $10-20 cash given to a student a couple students. Plus various experimental economics and psychology programs that would pay out cash based on performance in various market simulations, some of which were much more complicated variations on the prisoner's dilemma.
Living in the Midwest, I've come across quite a few people that used to live in Nebraska and Iowa, and all were very happy to no longer to be living there, some bad mouthing the states quite regularly. That is quite a biased selection of people, but they at least moved because of jobs and not because they just wanted to live some place different. I found it rather unusual, as I'm more used to a much more polarized split with both good and bad views from people who have lived in other states (including several near the bottom on that map).
As you said, you could order them as a kid, and you can still order E and F engines now. Even when I was a kid, the store near me didn't carry anything above a B size, and larger sizes had to be ordered via mail (depends where you live, ymmv, etc.).
If the WWW was not invented, you could still distribute your cat gifs by Usenet and FTP which predate the WWW by ~10 years and ~20 years respectively. Even one of the guys they mention there, Steve Case, was selling online services years before the WWW was conceived of by Berners-Lee. There is a lot more to the internet than the world wide web...
I thought the whole point of projects like RepRap was to have an open source printer that could print itself, and as of several years ago it could to the extent it only needed the addition of some Arduino circuits, stepper motors and cheap steel rods. There should now be a lot of variations freely available so that anyone with a friend with a 3d printer can get a simple 3d printer themselves cheaply (ymmv with regards to quality of printer though).
There is something very weird about that bar chart, as it looks like it is double counting things. The top five categories, especially if fish includes the multiple classes of fish, cover all of the vertebrates as is, and it does look like the dark blue box does match the same size as the others combine in every bar. A stacked bar graph inherently shows trends in the total of the groups, and doesn't need a cumulative group to do so...
I imagine there are quite a few such organizations now. For example, the Dane County Friends of Ferals is now over a decade old. After the founder learned of how often cats had to be put down by the local humane society due to being too feral to adopt, a growing effort was made to tame the ferals instead. The result is the county being no-kill now (outside of medical issues), with ferals being tamed and adopted out to families (we have had one in our place for a couple years now) or for the older, grumpier ones, being adopted out to farms. The taming process is simple enough that volunteers can be trained in two days for cleaning & maintenance of the shelter plus socialization of cats.
The casinos don't want to scare away people who think they can count cards but are actually bad at it. Low number of decks is a selling point, making people think they have better chances of winning. Some people might even be able to sway the odds a little bit, but fall short of making them in their favor.
There are plenty of materials that change color in lighting, in part because fluorescent and led lighting will sometimes be missing parts of the spectrum. A variety of gemstones will look different in fluorescent lighting vs. in incandescent & sunlight. It just requires both the light source and the reflection/absorption spectra to have narrow-ish peaks & troughs.
I have a piece of neodymium glass on my desk that will be bright pinkish-purple in sunlight and one type of fluorescent lighting, and a grey-blue in other fluorescent lighting, and about any color in between with multiple light sources.
Here they are being jerks, because they know it will cost money to remove and fix the hole. But I've seen other high schools where the class planted a tree in a reasonable place, either in a line of other trees, or over a bench, etc. Although that hasn't stopped some of those cases being considered crimes still, because someone insists the tree needs to be removed for no reason other than "because."
It is impossible to levitate with just a static arrangement of basic magnets. You need some additional trick, like mechanical constraint, a diamagnetic material, motion, or active, electronic feedback. That said, as per some of the statements in my other comment, in this case it doesn't flip over because of Photoshop...
The problem with some of designs like these, is many of them are nothing more than aesthetic designs, sometimes just to use in the portfolio of a design company. There is little to no practical consideration of what is possible in a given form factor, sometimes even if done regardless of costs. It is like watching an architect design a skyscraper disregarding any current limits to material strength and practical issues like elevators. You might end up with a cool picture, but I don't know if I would call it product design or architecture if one completely throws out the real world constraints that are normally part of the challenge in the first place.
I have a piece of neodymium glass on my desk that will be bright pinkish-purple in sunlight and one type of fluorescent lighting, and a grey-blue in other fluorescent lighting, and about any color in between with multiple light sources.