A juvenile American mastodon skull lays trapped on top in natural asphalt at the Observation Pit building at the Page Museum. (Damian Dovarganes / Associated Press)
Visitors will be able to watch excavators working at the bottom of the reactivated Pit 91. (Damian Dovarganes / Associated Press)
Painter Jeff Haworth, left, and Page Museum staff member Sean Campbell repaint the mastodon replica by tar pit pool. (Lawrence K. Ho / Los Angeles Times)
