Volcanic Legacy: Tortoises chronicle eruption in their genes

An ancient volcanic eruption in the Galpagos Islands bequeathed diminished genetic diversity to one group of the archipelago’s famed giant tortoises, a new analysis suggests.

SLOW AND STEADY. This Galpagos tortoise, which lives on the slopes of the Alcedo volcano, belongs to a subspecies that has low genetic diversity that’s been linked to an ancient eruption.