A restoration expert in Egypt has been arrested for stealing a 3,000 year old bracelet and selling it purely for the gold content, with the bracelet then melted down with other jewellery. Obviously, this sort of artefact CANNOT be replaced. Ever. And any and all scientific value it may have held has now been lost forever. It is almost certain that this is not the first such artefact destroyed.
Time zones are how customers and businesses are synchronized, if they are not immediate neighbors. Time zones are a result of the invention of telegraphs and railways, for the first time making it necessary to know the local time of people you can't just walk over and ask. And as long as you don't abolish long distance communication and travel, the need for time zones will continue.
DST is for countries outside the Tropics, where the time of Sunrise and Dawn differs greatly between the saisons.
It makes sense for Brazil to have no DST. It makes sense for Minnesota to have it.
The experiments to put gas turbines into cars for sale ended two years before NOx mandates were enacted. They were continued for race cars, which aren't affected by the mandates, but fizzled out a few years later.
Ma Bell is a mean mother!