Tree rings reveal how climate toppled Chinese dynasties
Trees are natural timekeepers, silently recording the passage of years in their rings, growth patterns, and changing foliage. Their annual rings, visible in cross-sections of trunks, tell stories of past climates, droughts, and rich seasons.
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)