The 2025 Eskom Expo International Science Fair (ISF) ended on a high note as outstanding young innovators were recognised for their exceptional research and creativity. The fair, held at the Convention Centre at Emperors Palace in Kempton Park from 6 to 10 October 2025, brought together the brightest young minds from South Africa, Lesotho, Namibia, Zimbabwe, Ireland, India and Russia.
Taking top honours was Christopher May from Otto du Plessis High School in the Port Elizabeth Region, who was named Top Senior Scientist and awarded a R100,000 cash prize for his groundbreaking project, “Differential Geometric Modelling of Sound Signals and Ultrasound Imaging.” The Grade 12 learner impressed judges with his mastery of complex mathematics and innovative application of differential geometry to sound analysis. His geometric modelling of sound waves led to enhanced ultrasound imaging, improving diagnostic accuracy and demonstrating how mathematics can transform healthcare.
The Top Junior Scientist award, worth R75,000, went to Khushi Lall from Tyger Valley College in the Northern Gauteng Region for her project, “Garlic: Nature’s Secret to Food Preservation.” Motivated by the global challenge of microbial resistance, the Grade 9 learner explored the antibacterial properties of garlic against pathogens such as Staphylococcus aureus. Her meticulous laboratory work and scientific reasoning impressed judges, marking her as a promising scientist in the making.
Another notable winner was Lethabo Kgwete from Moleshatlou Secondary School in the Capricorn Region, who received the Top Development School award and R75,000 for her project, “The Effect of Livestock Green Compost Tea.” Inspired by the struggles of small-scale farmers, Kgwete developed an eco-friendly compost using organic waste such as fruit peels, dry grass and eggshells. Her research demonstrated that the nutrient-rich compost tea significantly improved crop growth, offering a sustainable solution for increasing agricultural yield in rural communities.
Eskom Development Foundation Acting Chief Executive Officer Mologadi Motshele commended the winners, saying Eskom was proud to empower young scientists who continue to push the boundaries of innovation. “Each year, thousands of learners benefit from Eskom Expo, gaining access to opportunities that would otherwise be out of reach. By pursuing STEM fields, these learners are shaping a brighter and more prosperous South Africa,” explained Motshele. A total of 30 Gold, 77 Silver and 131 Bronze medals were awarded at the Grand Awards ceremony. Several learners also earned the chance to represent South Africa at international science fairs in Taiwan, Tunisia, China, Indonesia, the USA and Türkiye, a testament to the Expo’s global impact.
In conclusion, Eskom Expo Executive Director Parthy Chetty congratulated the young scientists for their ingenuity and determination. “This is a celebration of curiosity, courage and creativity. To students everywhere, let this be your spark. Science opens doors to solving global challenges and shaping the future. Keep exploring, keep asking questions and believe in the power of your ideas.”
