Comments Send Print Share Recommend Tweet Study finds huge portion of vertebrates at risk of extinction Chicago researcher says human impact on biodiversity cuts both ways. October 26, 2010 Gabriel Spitzer Download Story Comments Send Print Share Recommend Tweet Categories biodiversity, biology, View the discussion thread. Top Headlines On WBEZ.org Chicago's biggest 'L' rebuild Kwame Dawes sings of Jamaica Chicago's best diner breakfasts What’s (still) manufactured in Chicago Where was Rep. Aaron Schock at 25? Spy cam, icefish make climate change connection Historic South Side theater for sale Chicago bike culture 101