The destruction of recent fires is challenging our belief that with enough time, love and money, every threatened species can be saved. But there is plenty we can, and must, now do.
Once you include insects, snails, worms and other small creatures, it's clear the fires could cause one of the biggest extinction events of the modern era.
If you've never heard of a form of wave called a 'seiche' – which can occur in swimming pools during earthquakes – this is your chance to catch up.
Chytrid fungus has caused declines in 501 amphibian species, according to a new analysis. Most of the damage happened in the 1980s, before the fungus itself was even discovered.
More evidence that the asteroid hit on Earth that marked the end of the dinosaurs could have triggered a deadly increase in volcanic activity.
Tracing extinctions that happened centuries ago is difficult. But in New Zealand, the last place to be settled some 750 years ago, ancestral Māori oral traditions retain clues about lost species.