Liam Shaw

At some point in the past, humans and other apes lost their tails. Research recently published in Nature proposes a mechanism to explain how.

In the 1880s, the Danish bacteriologist Hans Gram was working in the morgue of the Berlin city hospital, trying to identify bacteria in sections of lung tissue under the microscope. But there was so much blood that the bacteria were ‘impossible to see’. He used a dye – gentian violet – to stain the whole sample, then rinsed it with alcohol to wash out the purple colour. The bacteria appeared ‘an intense blue (often almost black)’ while the human cells were unstained.

Thirty-nine asylum seekers were received onto the Bibby Stockholm, moored off Portland, on 7 August. The opening of the barge had been delayed by fire safety issues including a door being fitted the wrong way around, but Robert Jenrick, the immigration minister, told Sky News: ‘I can absolutely assure you that this is a safe facility.’ On the day the asylum seekers arrived preliminary results suggested the presence of Legionella in the water supply – the bacterium that causes the form of pneumonia known as Legionnaires’ disease. They were not evacuated until four days later.