5 ms·
Speaking of, when I think about it, it's amazing we've been keeping track days and years exactly for all this time (about 4000 years), with different calendar s
by astrobe_ 4y ago
Speaking of, when I think about it, it's amazing we've been keeping track days and years exactly for all this time (about 4000 years), with different calendar systems between civilizations. I guess astronomic event records (supernovae, comets, eclipses,...) serve as benchmarks so we can reconstruct relatively accurate timelines (the event you indirectly refer to has some uncertainty) from this cacophony.
- Archelaos 4y agoWhen it comes to years, the most accurate unbroken timelines are based on tree rings (and similar, such as annual layers of sediments). The longest, the Hohenheim Tree Ring Timeline (Central European pine) goes back to 10,461 BC, and researchers hope to extend it another 2,000 years back.