For most of human history, extinction has been understood as an immutable fact of nature—a one-way door that, once closed, could never be reopened. Species disappear, their genetic innovations vanish ...

"The passenger pigeon, the great auk, the Tasmanian tiger--the memory of these vanished species haunts the fight against extinction. Seeking to save other creatures from their fate in an age of ...

Humans already intervene in nature through land use, climate impacts, and species management. The harder question is when intervention is responsible. Colossal frames de-extinction as a conservation ...

It is good to see a demand for an ethical dimension to climate talks (11 November, p 8). Clearly in human terms many of the societies that are likely to be most disadvantaged by global warming are ...