adding README

README

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+Shape: 4,084 rows × 13 columns
+Domain: Humanities — this is an archaeology/paleoecology dataset about pollen-based vegetation openness scores over time from two sites in northern Germany (Belau and Woserin).
+Columns:
+
+Unnamed: 0 — row index
+calBP — calibrated years Before Present (time axis)
+CE — year in Common Era (negative = BCE)
+Belau_PC1 — pollen openness score (Principal Component 1) for Belau site — 3,878 missing values
+Woserin_PC1 — pollen openness score for Woserin site — 3,928 missing values
+Belau_PC1_inter — interpolated openness score for Belau
+Woserin_PC1_inter — interpolated openness score for Woserin
+MEAN — mean openness score across both sites
+SMOOTH_MEAN_50y — smoothed mean over 50-year window
+SMOOTH_MEAN_100y — smoothed mean over 100-year window
+SMOOTH_MEAN_150y — smoothed mean over 150-year window
+SMOOTH_MEAN_200y — smoothed mean over 200-year window
+SMOOTH_MEAN_250y — smoothed mean over 250-year window
+
+"You can't photograph a place you haven't walked through slowly."