named leader of the governing Zanu-PF party and Zimbabwe's premier.

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On Friday, Moroccan children head to the Great Mosque of Sale near the capital, Rabat, to pray for rain. The king has issued a royal decree for citizens to pray for rainfall and end the dry spell troubling Morocco's agricultural sector.

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A shipwrecked migrant battles waves in the Mediterranean sea to board an NGO search and rescue boat on Wednesday.

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Days earlier, African migrants are pictured in a courtyard at a detention centre on the outskirts of the Libyan capital, Tripoli. Recent footage of slave markets - where African migrants hoping to reach Europe are instead sold to Libyans for unpaid labour - has caused outrage.

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A visitor to Cairo's Egyptian Museum inspects theErosion of atmospherically deposited radionuclides as affected by soil disaggregation mechanisms.
The interactions of soil disaggregation with radionuclide erosion were studied under controlled conditions in the laboratory on samples from a loamy silty-sandy soil. The fate of 134Cs and 85Sr was monitored on soil aggregates and on small plots, with time resolution ranging from minutes to hours after contamination. Analytical experiments reproducing disaggregation mechanisms on aggregates showed that disaggregation controls both erosion and sorption. Compared to differential swelling, air explosion mobilized the most by producing finer particles and increasing five-fold sorption. For all the mechanisms studied, a significant part of the contamination was still unsorbed on the aggregates after an hour. Global experiments on contaminated sloping plots submitted to artificial rainfalls showed radionuclide erosion fluctuations and their origin. Wet