Final answer:
Tim White discovered the Ardipithecus ramidus (Ardi) fossil in Ethiopia, which is the first hominin species dated to the Pliocene era and exhibits bipedal characteristics.
Step-by-step explanation:
The scientist who discovered the Ardipithecus ramidus (Ardi) fossil is Tim White. In 1992, Tim White, an American paleoanthropologist, found the fossil in Ethiopia. Ardi is dated to about 4.4 MYA and represents the first hominin species discovered that has been dated to the Pliocene era. Ardi's bipedal characteristics include the forward position of the foramen magnum and the presence of an opposable big toe.
Paleoanthropologist Tim White discovered the Ardipithecus ramidus, known as Ardi, in Ethiopia in 1992, contributing significantly to our understanding of early human evolution.
The scientist who discovered the Ardipithecus ramidus (Ardi) fossil is Tim White. This discovery took place in Ethiopia in 1992 and has been significant in the study of human evolution. Ardipithecus ramidus, often referred to as Ardi, dates back to about 4.4 million years ago and has provided crucial insight into the traits of early hominins. Particularly noteworthy is the evidence suggesting that Ardi was bipedal, a characteristic seen as a key step in the evolutionary path to modern humans.