Conservation biologist John Ewen discusses the recent reintroduction of Tasmanian devils to mainland Australia after a 3,000-year absence and issues that need to be considered when bringing long-departed animals back into an area.

Data on vertebrate species that have become, or are likely to become, extinct reveal plant eaters are most under threat.

Species that come up with new ways to find food may be more likely to survive in habitats disturbed by agriculture and other human activities.

A new study finds that the extinct European cave bear’s large sinuses represent a tradeoff between hibernation length and the flexibility of their diets.

Experts warn that an explosion of hooded vulture deaths in Guinea-Bissau could push the critically endangered species to the brink of extinction.

The rate of population decline is outpacing the ability of the bees to find a new habitat.

Carbon cycle modeling and paleotemperature records argue that an asteroid impact—not volcanic fumes—was the main driver of the dinosaur die-off.

Researchers’ simulations suggest that small population sizes and inbreeding made Neanderthal populations vulnerable to chance fluctuations in population size.

The site, Corral Bluffs in Colorado, also reveals how plants evolved and how ecosystems rebounded after the asteroid impact.