Stephen Hawking, one of the most brilliant physicists ever to have lived, used to publicly say this every year or two, because it is perhaps the most important thing humanity should be doing but is only barely/slowly doing. Now that he is gone, I’ll repeat it: for the survival of our species, humans really need to leave this tiny, fragile little planet as quickly as possible. At national and global levels, instead of putting resources into fighting with each other and building things on this planet, we should be focusing on building space stations, fast ships, and colonies on other planets and in other solar systems. Currently, our entire species could be wiped out by global warming, over-population, nuclear war, one large epidemic, asteroid, solar flare, and on and on. We need to go and spread out, now.
Thinking about how, according to Einstein, things that travel at/near the speed of light don’t/hardly age compared with the rest of the universe, I wonder if encoding one’s mind on light (or another physical phenomenon that travels at the speed of light in a vacuum, such as electromagnetism) is how beings (e.g., devas) could approach immortality. To live for as long as possible, because anything less than perfect light speed means aging and eventual death, they might have to either stay in as perfect of a vacuum as possible (i.e., deep space or the voids between galaxies), which I imagine would be a very dull way to live (e.g., going around in circles in utter nothingness forever), or might have to find some way to fly forever at light or faster-than-light speed (e.g., using an Alcubierre drive). Gravity wells have a similar effect on time (e.g., time moves slightly slower at the center of the Earth than at the surface), but it is unclear how anything could survive at the center of enough mass to practically stop time relative to the rest of the universe (e.g., inside a supermassive black hole).