Nigerians rescued from a Boko Haram camp in the north. The terrorist group is just one element of insecurity in the region.
EPA
Chukwuma Al Okoli, Federal University Lafia
Banditry in northern Nigeria is making an already precarious security situation in the region worse.
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Business + Economy
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Chibuikem Nnaeme, University of Johannesburg; Leila Patel, University of Johannesburg; Sophie Plagerson, University of Johannesburg
Government policies need to acknowledge individual agency as a mechanism for change, while reducing barriers to income-producing activities.
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Mike Rogan, Rhodes University; Caroline Skinner, University of Cape Town
The informal sector represents an opportunity to improve the lives of a large part of the workforce. Government should desist from harming livelihoods and broaden the scope of policy measures.
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Health + Medicine
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Ryan Blumenthal, University of Pretoria
Not much is known about the pathology of trauma of black mamba bites -- that is, what the black mamba's toxin does, physically, inside a victim's system.
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Frederick Wekesah, African Population and Health Research Center
Societal pressures make it hard for people living in low-income areas to change their ways.
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From our international editions
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Kelly Sims Gallagher, Tufts University; Fang Zhang, Tufts University
The United Nations is calling on world governments to step up action against climate change. Can China, the world's biggest carbon emitter, fulfill its pledges?
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Tobias Jackson, University of Cambridge; Sami Rifai, University of Oxford
The monster trees are almost 90m tall, and may make the Amazon's northeast a much greater carbon sink than previously thought.
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Angelos Tsiaras, UCL
K2-18 b is now the exoplanet most likely to be habitable.
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Ron Beadle, Northumbria University, Newcastle
Bruce Springsteen is The Boss, Aristotle is The Philosopher. And they have a great deal in common, if you know where to look.
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En español
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Hester Hanegraef, Natural History Museum
El homínido conocido como Lucy puede no ser el antepasado directo de los humanos.
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Manuel Peinado Lorca, Universidad de Alcalá
Los incendios forestales de la Amazonía son lamentables por múltiples razones, pero no están destruyendo el suministro de oxígeno de la Tierra.
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