Imagine a fridge that doesn't need electricity! That's exactly what Mohammed Bah Abba, an amazing innovator from northern Nigeria, created. Born in 1964 into a family of pot makers, Mohammed grew up mastering the art of pottery. He later expanded his knowledge by studying biology, chemistry, and geology. This unique blend of traditional skills and scientific education helped him create a groundbreaking invention called the Pot-in-Pot preservation/cooling system.

Here's how it works: you have two clay pots, one smaller than the other. The smaller pot sits inside the larger one, and the space between them is filled with wet sand. As the water evaporates from the sand, it cools the inner pot, preserving items like fruits and vegetables. It uses no electricity, just basic science—how cool is that? His pot-in-pot system became a life-changer for many communities, showcasing how traditional knowledge combined with modern science can solve real-world problems. His invention continues to inspire people worldwide, reminding us that technology doesn't always have to be high-tech to be