<P> H. rhodesiensis is now mostly considered a synonym of Homo heidelbergensis, or possibly an African subspecies of Homo heidelbergensis sensu lato, understood as a polymorphic species dispersed throughout Africa and Eurasia with a range spanning the Middle Pleistocene (c. 0.8--0.12 mya). Other designations such as Homo sapiens arcaicus and Homo sapiens rhodesiensis have also been proposed . White et al. (2003) suggested Rhodesian Man as ancestral to Homo sapiens idaltu (Herto Man). </P> <P> The derivation of Homo sapiens from Homo rhodesiensis has often been proposed, but is obscured by a fossil gap during 400--260 kya . </P> <P> Kabwe 1, also called the Broken Hill skull, was assigned by Arthur Smith Woodward in 1921 as the type specimen for Homo rhodesiensis; most contemporary scientists forego the taxon "rhodesiensis" altogether and assign it to Homo heidelbergensis . The cranium was discovered in Mutwe Wa Nsofu Area in a lead and zinc mine in Broken Hill, Northern Rhodesia (now Kabwe, Zambia) on June 17, 1921 by Tom Zwiglaar, a Swiss miner . In addition to the cranium, an upper jaw from another individual, a sacrum, a tibia, and two femur fragments were also found . The skull was dubbed "Rhodesian Man" at the time of the find, but is now commonly referred to as the Broken Hill skull or the Kabwe cranium . </P> <P> The association between the bones is unclear, but the tibia and femur fossils are usually associated with the skull . Rhodesian Man is dated to be between 300,000 and 125,000 years old . Cranial capacity of the Broken Hill skull has been estimated at 1,230 cm3 . Bada, & al., (1974) published the direct date of 110 ka for this specimen measured by aspartic acid racemisation . The destruction of the paleoanthropological site has made layered dating impossible . </P>

When were the remains of broken hill man discovered