Your letters.

This document is a collection of letters from readers published in New Scientist. The topics covered include the benefits of different diets, the importance of social support for new mothers, the potential of electric cars to alleviate grid shortages, the nature of dark matter, the timing of the Anthropocene epoch, the complexities of addressing climate change, the use of millikelvin to measure global warming, and the potential link between COVID-19 and schizophrenia. The letters offer diverse perspectives and insights on these subjects, providing valuable information for library patrons conducting research. [Extracted from the article]