When Satan sinned...
Isaiah 14:12-14, "How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: I will ascend above the heights of the clouds; I will be like the most High."
...all creation was damaged beyond repair and the heavens and the earth started dying.
When Adam and Eve believed Satan's Great Lie...
Genesis 3:4-5, "And the serpent said unto the woman, Ye shall not surely die: For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil."
and they sinned...
Genesis 3:6, "And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat."
...and all mankind was damaged beyond repair and everyone started dying.