This week, we get an insight into southern African genomes as scientists have sequenced the DNA of members of the Khoi San to see what genes they have preserved. We also find out how researchers in South Africa have developed a new microbicide gel that could significantly reduce HIV numbers and in the news, we discover how moss spores travel on mushroom clouds and reveal a new, more efficient way to convert carbon dioxide back to carbon. Plus, we calculate how much gas a human would need to let out to lift themselves off the ground, in Question of the week!
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