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Local rato (shamans) take part at the opening ceremony of the Pasola in Sumba, Indonesia. The date of the Pasola – concomitant with the arrival of the nyale worms – is set by the shamans, who observe the moon and the tides around Februay and March. Seven days after the new moon in February and six days after the new moon in March, the nyale will swarm. RNS photo by Alexandra Radu