Kalahari Debate they are insufficient to be able to make such a claim. The same is true of the cattle bones found in Botswana. The small numbers of cattle bone fragments found on San archaeological sites have made scholars question Wilmsen’s argument. Kalahari Debate The Kalahari Debate is a series of back and forth arguments that began in the 1980s amongst anthropologists, archaeologists, and historians about how the San people and hunter-gatherer societies in southern Africa have lived in the past. On one side of the debate were scholars led by Richard Borshay Lee and Irven DeVore, considered traditionalists or "isolationists." On
PDS 70 PDS 70 PDS 70 (V1032 Centauri) is a low-mass T Tauri star in the constellation Centaurus. Located approximately 370 light-years from Earth, it has a mass of , and is approximately 10 million years old. The star has a protoplanetary disk containing a nascent exoplanet, named PDS 70b, which has been imaged, the first confirmed image of a newborn planet. The protoplanetary disk around PDS 70 was first hypothesized in 1992 and confirmed in 2006 along with a jet-like structure. The disk has a radius of approximately . In 2012 a large gap (~) in the disk was discovered, which