Far across the universe in a distant galaxy, MIT astronomers have spotted a strange radio signal that keeps firing out towards Earth in fast bursts. What - or who - could be causing them? Wrong kind of rays on the track...are rail delays sparked by solar storms? Tech helping Europe deal with extreme heatwave, plus the Met Office on the UK's rising temperatures. An X-Ray reveals secret Vincent van Gogh self-portrait behind painting. BMW puts heated seats behind £15-a-month ‘paywall’. Don’t download leaked beta version of Skate 4, urges EA. Liver disease linked to risk of dementia. Arctic scientists check count of walruses from space.

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