Christoph Burgstedt/Alamy
When I die, what happens to my microbiome?
Bill Smith,
Doylestown, Pennsylvania, US
Evgenii Puzanov/Alamy
Does space really smell like an overdone barbecue, as astronaut Tim Peake has said? And can the molecules carrying the smell exist in sufficient quantities in a near vacuum?
Anne Downer,
Bristol, UK
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