Drake Equation Keychain

Featuring an equation and related charms that will resonate with those who get it! We create items that might convey a sense of wonder even to those unfamiliar with the concepts. Are aliens real? The Drake Equation is a famous formula that offers one perspective on this question. It's an equation that can calculate whether "intelligent civilizations capable of communication" exist within our galaxy. We encourage you to research the parameters it uses! --- ☆ Materials Plastic Resin Metal (Please be mindful if you have metal allergies) ☆ Size The size of the equation portion varies by type. Each piece is handmade, so there may be individual differences even for the same equation. Please choose your favorite. --- This item uses resin. While the resin is resistant to yellowing from UV exposure and the passage of time, please store it away from direct sunlight after use. ※ As metal parts are used, those with metal allergies who are concerned should refrain from purchasing. ※ As this is a handmade item, the size and shape may vary slightly for each piece. We appreciate your understanding. ※ If natural materials are used for parts, there will be individual differences in size, shape, color, and pattern.