Environment Half of Costa Rica’s Regrown Forests Are Gone Within Two Decades Secondary forests are vital parts of the ecosystem, but in Costa Rica many of them are re-cleared before achieving old-growth levels of biodiversity. Rodrigo Pérez Ortega
Environment A Study Finds That the Costs of Hydroelectric Dams Have Been ‘Grossly Underestimated’ Dams have been linked to habitat degradation, worsened biodiversity, and negative changes in river ecology. Claire Asher
Environment A Giant Quaking Aspen Forest Is Trembling Under Our Watch A cloned aspen grove that's thrived for millennia is feeling the pressure of just 50 years of human activity. Emma Sarappo
Environment Measuring the Ecological Impact of Losing Forest Elephants A new study looks at the damage that would occur to flora and fauna if forest elephant populations continue to decline. Emily Clark
Environment Human Beings Have Dramatically Reduced Mammal Populations in the Atlantic Forest A new study shows that human interactions have hurt the once ecologically "exuberant" and "megadiverse" South American region. John C. Cannon
Environment The Tropics Are in Trouble Plants and animals in the tropics are threatened by a range of issues, warn researchers writing in the journal Nature. Rhett A. Butler
Environment How Increased Logging to Prevent Wildfires Hinders Biodiversity The Trump administration has posited that more active management of forests could help prevent future fires, but the science doesn't back that up. Derek E. Lee
Environment The Importance of Keeping Forests Intact A recent study illustrates why humans need to step up their efforts to save the world's forests. Morgan Erickson-Davis
Environment Happy Global Last Resort Day One hundred years after its extinction, the Carolina parakeet is more than an extinct species. It's a reminder that we have one last chance. Christopher Cokinos
Environment How Political Instability Undermines Protected Areas A new study shows that good governance is critical for conservation success. Kate Wheeling