Final answer:
Paranthropus robustus was discovered by Robert Broom in 1938 in South Africa. This species is one of the robust australopithecines, known for its specialized features for a hard-chewing diet.
Step-by-step explanation:
Paranthropus robustus was discovered by the South African paleontologist and medical doctor Robert Broom in 1938 at a site called Kromdraai in South Africa. This species is one of the robust australopithecines, which also includes Paranthropus boisei and Paranthropus aethiopicus. P. robustus is known for its large features, such as a sagittal crest and a flared zygomatic arch, which indicate strong muscles for chewing a hard diet of nuts and seeds. The discovery was particularly significant as it shed light on the variation among early hominid species and their adaptations.