New research uncovers reversal of evolution in island plants. On the younger, volcanic islands of the Galápagos, wild tomato plants are exhibiting an unusual behavior. They appear to be discarding millions of years of evolutionary changes and reverting to a more ancestral genetic form, one that reactivates long-dormant chemical defenses. These tomatoes, descended from South […]



Summary

Galapagos tomato plants are reversing evolution. These plants, descended from South American species, are reverting to ancestral forms on younger volcanic islands. Specifically, they are reactivating dormant chemical defenses. This “evolutionary reversal” suggests adaptation to the unique pressures of the islands, potentially related to herbivore presence or nutrient scarcity. The research highlights the dynamic nature of evolution and the possibility of regaining lost traits under specific environmental conditions.

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