Making a second decision mandatory makes it harder to change existing laws. This can be a good thing in some cases, but not always. It increases conservatism (in that it's harder to change things).
AM doesn't reach further than FM, it's just that historically we've been using AM at lower frequencies, and these travel further. You could transmit with FM just as well on these frequencies, and get the same range.
These radio telescopes don't transmit anything at all, they listen to radio waves coming from the cosmos. Much like a normal telescope doesn't transmit light.
The same worries exist here too though. The blood bank isn't allowed to pay you for your plasma, but it's absolutely a for-profit organisation that runs on selling your plasma to pharmaceutical companies.
I still believe it's a good thing to donate, but sometimes it feels a little icky that there's also a businessmodel around it
IR bottom heaters are usually not strong enough for reballing. They're for boards that are hard to solder, because there's a lot of copper or a heatsink for example.
The bottom heater preheats the whole board, not to soldering temperatures but enough to make soldering a lot easier.
I love it when they have a crunchy outer side. Much stronger flavour