Are living beings hiding on distant planets, waiting to be found? That question has captured the minds of scientists and dreamers alike for generations. But as researchers continue the search for ...

Introduction: Nonnative species in the world / David Pimentel -- The impacts of alien plants in Australia / Richard H. Groves -- Environmental and economic costs of invertebrate invasions in Australia ...

Space pioneers will bring 3D printers with them to make the tools, structures and habitats space pioneers need to survive in a hostile alien environment. JumlongCh JumlongCh/Getty Editor’s note: The ...