Considering what we know about the key ingredients for life's formation on Earth, here are three explanations for how this process may have occurred on our sister planet.
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Articles on Alien species
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The rapid invasion is a major threat to the environment and rural people’s livelihoods.
Scientists and soldiers deal with alien invaders in the new Predator movie, but how does the science stack up? With brains and brawn you'd think they'd know how to keep an alien tied down to a table.
Developing countries have been slow to react to the alien species problem. Its impact can be massively reduced if policies are developed to deal with the issue.
Many alien plants and animals have been introduced to Africa from other regions and spread from country to country, often having devastating effects.
We continue to search for intelligent life elsewhere in the universe. But if we find ET there are those who question whether we should make contact or not.
Keeping non-native reptiles as pets is against the law – with good reason. Alien species traded on the black market can potentially establish themselves in the wild if they are released or escape.
Top contributors
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Researcher at Research School of Astronomy and Astrophysics and the Research School of Earth Sciences, Australian National University
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Postdoctoral Research Fellow, The University of Queensland
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Assoc Prof in Invasion Biogeography and Biosecurity, University of Adelaide
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Professor of Applied Mathematics, University of Adelaide
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Professor, Queensland University of Technology
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PhD candidate in invasion ecology, University of Adelaide
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Postdoctoral research fellow, University of Pretoria
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Senior Lecturer Zoology and Entomology, University of Pretoria
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Associate Professor Zoology & Entomology, University of Pretoria
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Assistant Professor Freshwater Ecology, Invasive Species, Bioeconomics, Loyola University Chicago
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Researcher and core team member Centre for Invasion Biology, Stellenbosch University
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Professor and Head of School, UNSW
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PhD candidate, University of Nairobi
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PhD Student, UNSW
