This article does a clear and concise job of summarising a complex and interesting study looking at novel biomarkers of early Parkinson's Disease. The article explains scientific concepts (like the interpretation of an ROC-AUC value) and the technology in an accessible way. It mentions potential caveats, such as the need for more work to validate the test, in particular in relation to other conditions.

This article does a good job of providing a lay summary for a number of interesting aspects of age research. It provides a decent level of balance, in particular caveating the use of epigenetics as a readout of biological age, which is a field of substantial debate (https://doi.org/10.1186/s13059-019-1824-y). Certain research limitations and potential biases are not covered, for example research on blue zones is currently being critiqued for bias of samples used and potential misreporting of ages in certain highlighted populations (https://theconversation.com/the-data-on-extreme-human-ageing-is-rotten-from-the-inside-out-ig-nobel-winner-saul-justin-newman-239023).