The nastiest feud in science: Princeton geologist Gerta Keller has endured decades of ridicule for arguing that the fifth extinction was caused not by an asteroid but by a series of colossal volcanic eruptions — but she’s reopened that debate. The world’s worst mass extinction should make you very nervous for our future. The insect apocalypse is here — what does it mean for the rest of life on Earth? Insects, biodiversity, and mass extinction: An alarming new study, explained. Biological annihilation: Subhankar Banerjee on a planet in loss mode. Climate change and the escalation of extinction: As the climate crisis intensifies, try this simple exercise — count how many animals you can’t see.

Escalator to extinction: How mountain species are imperiled by warming. Humans are exterminating animal species faster than evolution can keep up. Humans didn’t cause animal extinctions in Africa, study says. Meet the scientists bringing extinct species back from the dead: New gene-editing technology could revive everything from the passenger pigeon to the woolly mammoth — but should scientists be playing God?