The earth is round, rotating on its axis and orbit
Earth don't know from which place to Earth will reach, Time (the environment) is uncontrollable when it changes Don't know,
Thinking about Life Sciences???
"In the world, if the thing connected with your sorrow is with you, then it is only yours. If the thing connected with the sorrow of others comes with you, that thing will cause you sorrow, it will never last."