The Associated Press

SEATTLE About 200,000 people are expected to see the “Lucy’s Legacy” exhibit that opens Saturday for a five-month run at the Pacific Science Center in Seattle.

Seattle is the second stop on a tour that began in Houston.

The 70 bone fragments found in Ethiopia in 1974 come from a human ancestor who walked upright 3.2 million years ago.

A University of Washington anthropologist, Patricia Kramer, told The Seattle Times that Lucy is one of the most important scientific discoveries of all time. Walking upright gave early hominids the ability to carry things and use their hands.