Amazingly it's possible to tell exactly which year a tree was cut a thousand years ago.
1. There's a radiation mark 993 CE. (solar storm)
2. From that mark you count the rings until the edge of the log (the waney edge)
@JohanEmpa This really is mind-boggling! This clearly illustrates the falsity of the notion that the past is "lost forever" and thus only the present exists.
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