Human cells are not designed to last for eternity. But maybe they really were designed that way initially, and Adam's cells underwent a fundamental mortality change when he ate the forbidden fruit. Who thinks so? Who thinks not? Give your reasons, and try to focus on physical death rather than other cellular changes (like Eve experiencing pain in childbirth when she wouldn't have before being booted out of the Garden).
[Where I am going with this: If Calvary reversed the curse, and the curse included physical death, there is a bit of a disconnect when the born-again believer experiences physical death -- which I suspect was something the earliest Christians didn't expect would happen to them, and may have been the occasion for Paul to write First Thessalonians (likely the earliest writing in the NT) to put the kibosh on that assumption.]
[Where I am going with this: If Calvary reversed the curse, and the curse included physical death, there is a bit of a disconnect when the born-again believer experiences physical death -- which I suspect was something the earliest Christians didn't expect would happen to them, and may have been the occasion for Paul to write First Thessalonians (likely the earliest writing in the NT) to put the kibosh on that assumption.]