Academics who research fuel poverty tend to focus on keeping warm in winter. But as another heatwave arrives, Rory Jones, of the University of Reading, says it’s time to start thinking about the cost of staying cool too.

His analysis of more than 13,000 households across England suggests that access to air conditioning is becoming another marker of inequality, with households most vulnerable to extreme heat often least able to afford it. As the climate warms, Jones warns of the emerging threat of summer fuel poverty.

While we worry about a heatwave, earth scientist Thomas Gernon has been investigating how the polar regions became cold in the first place. In particular, scientists have long wondered why Antarctica froze millions of years before the Arctic. Gernon, of the University of Southampton, thinks he has the answer.

Finally, low-orbit satellites could make terrible wifi on trains a thing of the past. Li Zhang, a communications professor at the University of Leeds, explains. This is not, however, an excuse to start playing videos out loud in the quiet carriage.