Latest William Kimbel Stories
The 4.4 million-year-old African species Ardipithecus ramidus, or "Ardi," is the focus of one of the most hotly debated issues in current human origins research. Scientists want to know how Ardi, an unusual primate, is related to human lineage.
Word of the Day
- A volcanic mudflow.
The word 'lahar' comes from Javanese.