Â鶹´«Ã½

A reduction in parental disgust as an infant develops isn't surprising, since breastfed babies tend to produce huge, explosive poos, which are like runny, yellow cottage cheese and can easily escape the nappy to coat the child, as well as their parent and surroundings. This often happens at inconvenient times, such as while at airport …

Disappointingly, due to the disruptive effect of lighting, sleep experts discourage reading in bed, which no doubt many find the only time for this enjoyable pursuit. Perhaps the best solutions are ebooks with a blue-light-blocking mode or the audio version of Â鶹´«Ã½ . In the latter case, a potential problem is the highly worrying …

Harm Schoonhoven raises the concern that people in a Mars colony would never be able to return to Earth. This eventuality was covered by The Hitchhiker's Guide to the Galaxy . In essence, its message was that those chosen to colonise a new world are those the home planet never wants to see again. Could …

Considering redox flow batteries, you state that they rely on "metals like lithium and cobalt, which are in short supply". In fact, many such batteries use cheap and common vanadium salts. This makes them attractive bulk electricity storage systems ( 18 January, p 19 ).

I always found it hard to believe in the many worlds version of the multiverse that is proposed to explain quantum behaviour ( 11 January, p 32 ). In essence, it says that a person, living on a tiny speck in the universe, measuring an even tinier subatomic particle that was in superposition, would create …

Your article on gauging vast distances with extreme precision says the 113 kilometres between two labs was measured to within 82 nanometres. I was wondering, was the measurement from the top of the grains of sand on the bricks or the bottom( 25 January, p 17 )?

Efforts to rewild the Scottish Highlands with lynx are being led by the Lynx to Scotland Project ( 1 February, p 22 )

Our ability to imagine possible futures probably evolved in large part to simulate threats. In The Time Machine , H.G. Wells didn't so much predict a dystopian future as highlight a path to help avoid it. As for tech barons who see stark, dichotomous futures, it is useful to remember that we live in a …

When it comes to moon dust, there is an even more significant risk to astronauts – specifically, to their lungs. Since the 18th and 19th centuries, many countries have tackled lung conditions on Earth emanating from industries such as mining, for example those caused by breathing in dust particles such as silica. Regolith contains a …

Tony Milligan decries belief in alien visitations. He needn't worry. They visited once, but didn't stay long. There is now a beacon in space with the message: "Don't bother visiting. Top (ha!) life form controlled by idiots. Spend time arguing, killing each other and destroying a quite pretty planet ( 8 February, p 21 )."