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Someone involved in the naming process is cackling every time they read about this @_TinaD is delighted, as many were , by the revelation that moons can have moons and they are called moonmoons ( 20 October, p 10 )

Chelsea Whyte lists alternatives to cow's milk ( 22 September, p 22 ). Potential convertees should be cautious as not all alternatives are what they seem, with price not necessarily being a helpful guide. Soya milk can contain as little as 5 per cent soya beans. The best I've seen in the UK is 12 …

I.Glenn Cohen and Alex Pearlman rightly discuss ongoing concerns about the ownership and use of data from devices such as smart pills and medical devices ( 29 September, p 22 ). But equally of concern is the almost total lack of "baked in" and properly audited security in the storage, extraction and transmission of the …

You describe a mantis shrimp that "creates a force that shatters aquarium glass" ( 29 September, p 40 ). This is simply not true. I'm a senior aquarium service technician with over 25 years of experience, and this is one of those stories that gets tossed around, yet there's no actual proof of it ever …

Simon Oxenham repeats the standard Â鶹´«Ã½ suggestion that a liberal outlook is the default in Western societies and that, conversely, a current propensity for conservatives to support right-wing "populist" parties is pathological ( 15 September, p 24 ). His assertion that higher voter turnouts may lead back to "a more familiar political landscape" is …

Andy Coghlan writes that the bombs dropped in the second world war rattled the edge of space ( 6 October, p 16 ). The total bomb load dropped on Vietnam in the mid 1960s and early 1970s was some three times that dropped on Europe over a similar timescale. One would expect a similar reduction …

The impact of electric cars raised by Roy Harrison focuses on sources of electricity to charge their batteries ( Letters, 6 October ). But the true impact will be seen when there is a substantial number of them, in the congestion they create. Will their drivers feel entitled because of the lack of pollution at …

Simon Terry and Stephanie Howard raise the ethics around deliberately causing extinctions, with the example of mosquitoes that infect people with malaria being genetically engineered to spread sterility in their species ( 13 October, p 24 ). Couldn't we instead engineer a mosquito not to carry the plasmodium that causes malaria? That would still allow …

Alastair Mouat writes that the head brewer at his Edinburgh brewery could distinguish between the same canned beer produced at different locations ( Letters, 15 September ). How does he know the head brewer wasn't having them all on?

• The actor who plays the lawyer in War with the Newts is Everal A. Walsh ( 13 October, p 48 ).