Latest Issue 6 Jul 2015 Latest Issue 6 Jul 2015 NewsLife Sciences Measuring the sixth mass extinction We still can’t say with certainty how many species live on our planet. by Belinda Smith Gallery Earth Sciences The big five extinctions by Viviane Richter What caused Earth's first five mass extinctions? News Space Found: the first stars in creation by Cathal O'Connell Have we finally glimpsed the first stars in the Universe? Opinion Life Sciences Wind farm syndrome and other imaginary ailments by Norman Swan Science cannot explain why wind turbines cause sickness. News Life Sciences The obesity fighting mushroom by Viviane Richter A tree fungus exerts its effects by nourishing beneficial gut bacteria. Review Life Sciences Cracking the Code review by Bill Condie A book about a parent's love for their ailing child. Feature Life Sciences From the vault: In living colour by COSMOS editors A look back at some of our most popular articles.