Timnit Gebru, co-lead of Google's ethical artificial intelligence team. Kimberly White/Getty Images More than 1,000 Google employees have signed a petition over the exit of prominent AI ethicist Timnit Gebru. More than 1,500 additional academic and industry names also have put their names on it. The petition demands Google explain why a research paper coauthored by Gebru was rejected by management. Are you a current or former Googler with more to share?