Should we bring extinct species back from the dead?, Science
The Book – Become Healthy or Extinct!
Biodiversity: 'Magical marine species' pushed toward extinction - BBC News
Chart: Threatened With Extinction
One-third of freshwater fish face extinction and other freshwater fish facts, Stories
Are Koalas Really Going Extinct? - JSTOR Daily
The Dodo is Dead, Long Live the Dodo!
Why 'De-Extinction' Is Impossible (But Could Work Anyway)
The Northeast's hemlock trees face extinction. A tiny fly could save them.
Researchers fight to save frogs from extinction – Harvard Gazette
Fragrant Genes of Extinct Flowers Have Been Brought Back to Life - Scientific American