In a study that has unprecedented implications to advance both medicine and biodiversity conservation, researchers have sequenced 131 new placental mammal genomes, bringing the worldwide total to more than 250.

San Diego Zoo Global conservationists reared young desert tortoises for one to two years before the planned release—a strategy referred to as “headstarting,” which provides a safe environment during their most vulnerable period, before translocating to the native habitat.

Genomes help us answer long-standing questions about Pacific pocket mice.