Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Researchers have discovered a nearly complete 3.8-million-year-old skull of an early ape-like human ancestor in Ethiopia.

'All bets now off' on which ape was humanity's ancestor