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Scientists say tomatoes in the Galápagos are evolving backward. A tomato in the Galápagos Islands is showing signs of what scientists are calling “reverse evolution” – reviving traits that disappeared millions of years ago. The plant, Solanum pennellii, caught researchers’ attention when it began producing chemical compounds not seen in modern tomatoes. These molecules, similar to those in eggplants, act like natural pesticides and appear to be reactivating ancient genetic pathways. The twist? These traits aren’t remnants from the past. They’re reappearing. On the younger, more barren western islands, the tomato seems to have adapted by reinstating ancestral genes – likely in response to harsher soil and limited nutrients. In contrast, the same species on older, eastern islands uses more modern defenses. The discovery challenges a long-standing idea in evolutionary biology known as Dollo’s Law, which suggests that once traits are lost, they can’t be regained in the same way. But here, scientists found the genetic shift was triggered by just a few amino acid changes – simple tweaks with big consequences. This could help researchers better understand how species respond to environmental stress, and how evolution might loop back on itself when conditions change. It may also offer insights for agriculture, from boosting pest resistance to engineering stronger, more resilient crops. Though the term “reverse evolution” is debated, this case shows that evolution isn’t always linear. It adapts. It reuses. And sometimes, it reaches back in time.