elihushaw

so I don't know much about spacetime or physics in general but I'm watching a Nova video on the illusion of time. On Earth, if you are closer to the ground time will move slower for you. Time will move faster for you if you are higher up relatively from the ground. Why does this happen?

bump

I was reading National Geographic's article on the creation of element 118 (found here). A few questions came up. How do they choose which elements to apply to each other? Besides the number of protons, what factors would help decide which elements to use? As an example, and to further those questions. Why use calcium-48 and californium-249 to try and create Element 118? (besides the proton count. So why those ions?)