Under the blazing Texas sun, dozens of volunteers mow grass and clean tombstones to help save what is left of Olivewood Cemetery's 4,000 graves. Some parts of the cemetery at first appear forgotten, with broken or dirty headstones. But the graveyard is in fact receiving much newfound care -- part of a modern push to preserve Black heritage, as interest in saving neglected or even erased African-American historical sites spikes. The "George Floyd murder, I think it just was a crystallizing moment," says Antoinette Jackson, a professor of anthropology at the University of South Florida, explaining the new interest in such places. African-American cemeteries "have been continually erased and information about them silenced," she says. IMAGES AND SOUNDBITES