The UK’s treasury secretary Liz Truss recently suggested that motorway speed limit for cars and vans should be increased to 80mph as a way of increasing national productivity. But Richard Llewellyn explains that while increasing speed limits may make driving more hazardous, it will have at best a marginal effect on journey times.

A new series of Doctor Who always makes for event TV – and more so this year, because for the first time the Doctor is played by a woman. Matt Hills watched from behind the sofa and reports that Jodie Whittaker handles the role brilliantly and that the latest storyline is exciting and inspirational in equal parts.

Chickens keep laying eggs, even when they don’t have a mate – why? Some curious kids were wondering, so we asked Emily Burton to share her scientific insights on the birds and the bees. And if you take an interest in agriculture, you’ll probably want to read up about the rise of the UK’s megafarms – the largest of which can “process” more than a million chickens per week.

The A levels taken earlier this year were of a recently reformed style. Designed to be more “rigorous”, they placed much more emphasis on exams, with minimal graded course work. But are they preparing students for life at university, where independent research and frequent tests are the norm? Matt Finn has been talking to undergraduates, lecturers and teachers to find out.

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