OneOnOne1162

Well, if what I've read in the past is correct the reason why things cannot go faster than light is because mass and energy are equivalent and at some point if you keep adding energy to go faster you hit a maximum point (since you continuously need more energy to accelerate). And of course, there's the time dilation effects where when you travel at a greater speed the flow of time changes for you. But the reason why I found this weird is I'm not sure how, if the first thing is true, the bullet can move at all. The conventional stuff I've heard about relativity (you know, the change in time experienced depending on speed and such) would lead me to the conclusion that the previous commenters said, but the very first thing made me wonder about that. I'm assuming it has to do with the fact that the energy that IS added to the bullet speeds it up a tiny bit in comparison with the rest and that because time is dilated it seems to be going normal speed? I don't know. I'm not entirely sure if I understand that part.

Okay, I figured something like that would happen. The universe is weird.

Hypothetically, if you were on a ship that was travelling at just below c (for example 299792457,9 m/s) and you fired a gun at another person on that ship from where you were sitting in the direction that the ship was moving, what would happen?

I was wondering about what factors caused humans to have traits and morphology different from Homo neanderthalensis and Homo heidelbergensis (our possibly closest ancestor with Homo neanderthalensis). For example neanderthals have a more sloped forehead, a broader nose, are smaller, have a barrelled chest, etc. So what different conditions caused them to develop each one of these traits or what conditions caused us to develop the traits we have? To give an example of the sort of anwser I might want, If my question had been about the morphology of birds with a particularly long and glorious tail like the male peacock I might expect this response: "This is sexual dimorphism caused by female choice. Where females are the ones choosing male mates and male mates have to find ways to stand out and attract wandering females to them. This probably became the case because the resources the bird feeds on were spread equally around their habitat as opposed to being concentrated in specific areas (in which case male-male competition would've happened instead of female choice and they might've grown more muscular but without the tail)." That's the sort of thing I'm looking for, except for course about the differences between Homo sapiens, Homo neanderthalensis and Homo heidelbergensis.