By eliminating the less fit individuals over time, predation can drive the population to increasing fitness in terms of survival and reproductive success.
The protests carried on for days and continue to simmer in a country whose social fabric has been torn by toxic masculinity and a violent colonial past.
Tourism ventures in a water-stressed region like southern Africa need to balance the needs of guests and staff with the needs of surrounding communities.
Communities who are the custodians of the knowledge associated with African traditional medicinal plants must derive a fair economic return from these natural resources.
Mason tirelessly sought to convince officials of the need to recognise and celebrate the African past, and the role that African people played in the making of modern South African society.
History shows that treatments and vaccines have been accessible to African countries only after the loss of millions of lives and typically years - sometimes decades - after developed nations.
No other photographer in southern Africa has documented war in the way that John Liebenberg did. He captured the life and the conflict of both sides in his body of work.
Associate Professor, Department of Environmental and Geographical Science and African Climate and Development Initiative Research Chair, University of Cape Town
Yarik Turianskyi is Manager of the Governance and African Peer Review Mechanism Programme at the South African Institute of International Affairs and guest lecturer in African Governance and Eastern European Politics, University of Pretoria
Professor and Programme Director, SA MRC Centre for Health Economics and Decision Science - PRICELESS SA (Priority Cost Effective Lessons in Systems Strengthening South Africa), University of the Witwatersrand