From Science Focus: “More and more adults have an extra artery in their arms as humans continue to evolve at a rapid rate, a study has found. Scientists in Australia believe that humans are undergoing a micro-evolution in which evolutionary changes can be observed over a short period of time. The artery forms while a baby is in the womb and is the main vessel that supplies blood to the forearm and hand, but it usually disappears during gestation and is replaced by the radial and ulnar arteries. However, some people retain all three. The investigation by Dr Teghan Lucas of Flinders University showed a significant increase in the prevalence of the artery. The team analysed records in anatomical literature and dissected cadavers from individuals born in 20th Century. “Since the 18th Century, anatomists have been studying the prevalence of this artery in adults and our study shows it’s clearly increasing,” said Dr Lucas.
Two men in a hot-air balloon in 1832 hold the record for highest altitude without oxygen
From Everything is Amazing: “It’s just before two on an afternoon in early September, and professional aeronaut Henry Tracey Coxwell has just discovered something that’s turned his blood cold. The balloon he’s riding in with meteorologist James Glaisher has developed a serious fault. As it rose above the countryside around Wolverhampton, it’s developed a slow but inexorable spin – and Henry’s just discovered this has tangled up the release-valve line, the duo’s only way of venting enough gas from the balloon to trigger a descent. Around them, the sky is turning a deeper blue. The temperature has fallen below freezing, and every surface is becoming slippery with ice. They’re past 8,000 metres, the altitude which mountaineers call ‘The Death Zone’, because of the catastrophic effect it can have upon the unprotected human body.”
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