People sometimes release pets into the wild, resulting in biological invasions.
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Analysis and Comment
Government leadership is needed to manage the aquifer as a system for all, including environmental services, rather than for the powerful few.
A film about Cape Town's environmental resources features a cast as diverse as breakdancers and wetland activists - and is being used as a study aid globally.
Fake copies of works by legendary black South African modernist artists are flooding the market - and one university is deploying a range of scientific tests to expose them.
All signs point to the Democratic Alliance being in deep turmoil which will affect its strength as South Africa's official opposition.
Food insecurity remains a serious challenge among university students in South Africa.
Ending the Boko Haram insurgency is the last hurdle in Nigeria's race against polio
Body mass matters in rugby. But other factors play a bigger role in determining victory.
What Cameroon needs is a properly mediated process signing all the parties to a pre-agreed agenda
Throughout his campaign Saïed positioned himself as the absolute embodiment of the will of the people.
The book depicts how Onkgopotse Tiro’s time at Turfloop amounted to a revolutionising political script for generations to come.
Black consciousness in South Africa changed blacks and whites.
Race is the fault line. Prominent black DA figures label attempts to remove leader Mmusi Maimane as an attempt by whites to force black members into a subordinate position.
Child poverty has important psychological and social consequences. This means solutions need to cover very many different angles.
South Africa's parliamentary system would make it difficult to achieve a fusion of parties.
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The Conversation Africa is expanding in West Africa.
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During almost all outbreaks, women provide the majority of care to the ill voluntarily in their homes at great risk and cost to themselves.
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The emergency in the DRC shows that despite all these positive changes, the global response to containing Ebola outbreaks is undermined by the lack of health care and public health infrastructure.
International news
For international observers, it may be stunning to see Justin Trudeau's government reduced to a minority after his meteoric rise to power in 2015. It happened because he disappointed his progressive base.
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Global Perspectives
As a hugely diverse continent, one thing has united Asia in the last 50 years: economic development.
Humans evolved through a series of highly unlikely events – so finding another intelligence like us would be like winning the lottery many times over.
Why the US decision to withdraw troops from northern Syria is so dangerous.
The gunmaker's move to stop selling AR-15s to civilians is not a response to concerns about gun control. Instead it's a reflection of how prevalent the AR-15 and comparable weapons are in the US.
The Princeton cosmologist helped pioneer our current model of the universe and began a whole new branch of physics.
We don't want to have to think about our role in creating the individuals who commit violence. Amazingly, Joker asks us to.
How to deal with a world that is going a bit off-kilter? Some classic texts can give a few pointers.
In some places, the ocean is almost 7 miles deep. Scientists exploring the ocean floor have found strange sea creatures, bizarre geologic formations and records of Earth's history.
As summer vacations approach, it's worth recalling the value of disconnecting and perils of multitasking in our digitally distracted lifestyles.
Regarded as one of The Beatles finest albums, Abbey Road is the last time all four band members were in the studio together.
The National Basketball Association's difficulty dealing with a tweet in support of Hong Kong protesters shows the challenges of having values and expanding into new markets.
Abhijit Banerjee, Esther Duflo and Michael Kremer win the Nobel Prize for Economics 'for their experimental approach to alleviating global poverty'.
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