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October 05, 2003Eruption scars genes of Galapagos tortoisesOne hundred thousand years ago, the Volcano Alcedo on the Galapagos island of Isabela, erupted, leaving a lasting mark on the genetic makeup of the local tortoise population. The Alcedo tortoise population is thought to have been severly reduced after the eruption and consequently exhibits far less genetic variation than neighboring tortoise populations. |
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