The thing is that they don't know. It's a puzzle with some educated guesses, based on some facts that they have managed to shake out of the dirt.

You see, dinosaurs and their skeletons have a lot of similarities to birds. Which means that you can make the educated - but difficult to prove or disprove - guess that a dinosaur would sound like a really huge bird.

Just by comparing a sparrow's sound to the sound of an ostrich, you get a hint of how size changes the sound. Apply similar reasoning to the size difference between an ostrich and a large dinosaur...and there IS a chance that they actually sounded kind of like it's pictured in a lot of movies.

Do we know for sure? No. Of course not. We cannot know for sure.

But guessing is fun too, when other scientists agrees that your guesses are not completely stupid.

Licensed medical practitioners are, somewhat simplified, taking an oath that they will always, always, always try to protect lives and help someone else avoid death.

In some beliefs, it's considered sinful to get medical help instead of accepting that your time has come.

This has created the need for some sort of middle ground gray area.

And that's what the DNR is for. If you tell your hospital that "if my heart stops, allow me to go peacefully", they will attempt to respect your wish to go when it's time to go, instead of attempting to keep you alive.

It's probably a hint mentally complicated for nurses and doctors, knowing that they COULD save someone, if that person actually wanted to be saved.

A car window is possible to open, which means that it "hangs" in a contraption in the door that disconnects it from the car a bit. And because the window would break eventually if it wasn't "rubbered up" a bit, it's also protected from vibrations.

A bus window, on the other hand, is an important part of the side of the bus in the regard that the bus needs at least a few windows to be intact, otherwise the roof will not be properly supported. In that kind of construction, you WILL feel the vibrations more, because you are literally leaning against the side of the bus when you lean against the window.

More often than not, they DO have a lot of smaller batteries that can be swapped out based on need.

It's just that, eh, the batteries are a safety hazard for rescue services when the cars are in accidents, and to make them less of a hazard they are combined into a large container that is comparably good at confining the hazard.

There are other reasons to, such as thermal control of the batteries and weight distribution concerns.