As well as being an interesting story about the ambiguity of PSA tests for prostate cancer, this is a solid, unhysterical piece of science reporting in a US newspaper, of the sort that appears in British papers during months with a letter “K” in their names.

This week, The Guardian contained a pull-out supplement on how you could have a “chemical-free garden”. It didn’t explain how you could cultivate imaginary plants in a high vacuum, the only way of achieving such a feat.