There are several Honours (SA citizens only), MSc (SA citizens, SA permanent residents, African nationalities only), PhD (all nationalities) and Postdoc fellowship (all nationalities) available in the fields of sensory and evolutionary ecology in the Animal Evolution & Systematics Group. For further details contact the head of the group A/Prof David Jacobs.
What are the causes of mysterious barren “fairy circles”? Mike Cramer, Nichole Barger and Walter Tschinkel in a recent paper suggest that they are produced by interactions between grasses enabled by coarse textured sand. Water and nutrients are highly mobile in the sands, allowing fairy circles to interact over distances > 5 m. The authors concluded that fairy circles are more closely associated with a highly connected soil environment, rather than particular biota.
How many species of humans have existed? It all depends on the concept of species that’s being employed. In some approaches, there was – and still is – only one. In others, there are as many as 17 species of Homo.