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It's easy to assume that, because they're such massive blubbery creatures, hippos wouldn't move very fast. But researcher John R. Hutchinson, who spends a lot of time researching large animals' locomotion, reveals that hippos move such fast speeds that they can become airborne - with all four feet off the ground at once.
The ceasefire brokered by the US to enable humanitarian assistance to reach some of the 7 million people displaced by conflict in the eastern part of the Democratic Republic of the Congo is a welcome step. Delphin Ntayoma, however, argues that lasting peace in the DRC requires addressing the conflict's underlying causes.
South Africans have the lowest savings - as a percentage of GDP - globally and among their peers in emerging markets. The government wants to raise the household savings rate and has introduced significant reforms to the retirement system, effective from 1 September this year. Economist Adrian Saville will analyse these changes and their implications in a four-part series starting today.
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John R. Hutchinson, Royal Veterinary College
This shows that hippos are one of the largest animals that still can get airborne at fast speeds and yet they are also adapted for an aquatic lifestyle.
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Delphin R. Ntanyoma, University of Leeds
Temporary ceasefire should be seen more broadly as a window to further engage with all parties to find long-term solutions.
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Adrian Saville, University of Pretoria
South Africa is making improvements to repair the country’s weak state of saving. The changes have important implications for people planning for retirement.
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Jennifer Fitchett, University of the Witwatersrand; Anson Mackay, UCL
The changes that were mapped represent the shift from a lake to the contemporary shallow wetland at the site.
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From our international editions
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Nicolas Forsans, University of Essex
Venezuelans head to the polls on Sunday to vote in an election that has so far not been a fair contest.
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Lilian Dove, Brown University
In some of the most remote places on Earth, tags attached to seals collect data at the cutting edge of ocean science.
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Samuel J. White, York St John University; Philippe B. Wilson, York St John University
Each person is home to about ten trillion viruses.
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Travers, Simon Fraser University
While transgender people have gained some recognition and human rights in the past decade, a well-financed reactionary movement is rolling them back.
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Mark Slee, Flinders University; Anthony Khoo, Flinders University
Migraine is many things, but one thing it’s not is ‘just a headache’. Here’s what causes the symptoms and the medication options to treat them.
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