Summary:

- The article discusses efforts to find and eradicate a potential invasive rat species on Rat Island, Alaska. The island's ecosystem is at risk if the rat, which may or may not exist, is present.

- Scientists are using innovative methods, such as peanut butter-baited traps and black lights, to detect the possible presence of the rat. These techniques are designed to attract and identify the rat without harming the island's native wildlife.

- The article highlights the importance of proactive conservation efforts to protect fragile island ecosystems from the devastating impacts of invasive species, even when the presence of the species is uncertain.