Pollen grains, though microscopic, hold immense clues to Earth’s ecological and human past. Scientists use them to reconstruct ancient forests, track sea-level changes, and identify major events like asteroid impacts and civilization collapses. Fossilised pollen from Missouri revealed how vegetation shifted after the asteroid that killed the dinosaurs. In Guatemala’s Lake Izabal, maize pollen spikes signaled Mayan deforestation before political collapse. From ancient extinctions to human land use, pollen offers a powerful timeline of change and recovery, acting as nature’s subtle yet lasting archive.
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