ylph

The only fuel you can make from water is hydrogen. The RS-25 engines used on the SLS core stage and the Space Shuttle used liquid hydrogen, as did the J-2 engines on the second and third stage of the Saturn V (but not the first stage, which used RP-1 (kerosene) burning F-1 engine)

Starship's Raptor engines use liquid methane however. There are a bunch of tradeoffs between the different fuels, but generally liquid hydrogen is more difficult and expensive to deal with. With low cost reusability being one of the primary objectives of Starship, liquid methane was chosen as the best option. The fact that it can also be manufactured on Mars was also considered, since CO2 is abundant in Martian atmosphere.

LOX is liquid oxygen, which is not a fuel, but an oxidizer. Starship is fueled by liquid methane. Methane can not be made from just water, you need a source of carbon. On Mars for example methane could be produced from CO2 in the atmosphere and water from ice.

YouTube video ads can't be blocked with just DNS blocking unfortunately, they are served from the same hosts as YouTube videos.

I think "popular" is stretching it here, Debian GNU/kFreeBSD is dead now, and while Hurd is interesting, it has ways to go.

Alpine is actually popular, particularly as a lightweight host OS to run docker.

You can have a Linux distro without GNU -Alpine Linux is a popular example

What is your source for this ? Recent polls show reunification support is still <2%, with about 6% open to reunification eventually but not now.

In 2018, before the crackdown in HK, the reunification support was 3%, with 13% open to it eventually - the events in HK have definitely significantly eroded support for reunification in Taiwan.

I have family in Taiwan and literally don't know a single Taiwanese person that wants reunification with the PRC.

Early computers had very limited resources, RAM, storage, etc. (first computer I worked with only had 4k of RAM for example) It often made sense to only use the last 2 digits of the year as an optimization in many common tasks that computers were used for, as both the 1800s and the 2000s were far enough away that most basic date calculations worked fine. Also, the industry was changing rapidly, and few people expected their software to be used for more than a few years - certainly not for decades, so focus was usually on solving the immediate tasks as efficiently as possible, without much consideration for the distant future.

However, it turned out that a lot of the code written in this period (70s and 80s) became "legacy code" that companies started relying on for far longer than was expected, to the point that old retired COBOL programmers were being hired for big $$ in late 90s to come and fix Y2K issues in code written decades ago. Many large systems had some critical ancient mainframe code somewhere along the dependency chains. On top of that, even stuff that was meant to handle Y2K was not always tested well, and all kinds of unexpected dependencies crept up where a small bug here, or some forgotten non-compliant library there could wreak havoc once date rolled over into the 2000s.

A lot of the Y2K work was testing all the systems and finding all the places such bugs were hiding.

Chinese is also not right - 正确的 (zhèngquè de) means "proper"

Left and Right as the sides are 左 (zuǒ) and 右 (yòu) - you can also add 邊 (biān) to each which means "side" to be more explicit, but they are also used separately in many contexts where the left/right meaning is needed.

The Chinese characters for 左 and 右 actually originated as pictograms of the left and right hand in the early forms of Chinese writing, but later forms both contain general "hand" component (𠂇) with components 工 and 口 added for differentiation

What's wrong with using a text editor to remove lines ? In vim for example :g/pattern/d or :g!/pattern/d with regular expressions is a powerful tool for removing lines in bulk if needed.

The kids always adapt though.

There is a strong survivorship bias in this though. Some kids do adapt, maybe even most, but many still are harmed, and have been by unhealthy exposure to radio, television, videogames, etc. in the past. Social media is even wreaking havoc in the older generations right now.

It's easy to point at the survivors and the success stories and say see, there is nothing to worry about - but that's also a bit like pointing at the lifelong smokers who do not get lung cancer as an argument against promoting non-smoking.