The South African Journal of Science is a multidisciplinary science journal published bimonthly by the Academy of Science of South Africa. Our mandate is to publish original research with an interdisciplinary or regional focus and to provide a forum for discussion of news and developments in research and higher education. About the cover: As the world moves towards cashless transactions, the many people in South Africa doing informal work for which they receive small amounts of cash or donations could increasingly receive less of this informal financial support. Harroway and Bekker describe the development of a secure architecture for cashless donations through a digital voucher management system based on blockchain. Other articles in this issue include: Donating using blockchainbased vouchers, heat health perceptions in minibus taxis, oldest ophiuroid
fossils in South Africa and much more!
