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Travel firms scramble to rearrange holidays amid new Covid measures Reviewed by Unknown on 8:14 AM Rating: 5

Nobel-winning stock market theory used to help save coral reefs Reviewed by Unknown on 8:14 AM Rating: 5

With Covid studies, the quality of the evidence matters | David Spiegelhalter and Anthony Masters Reviewed by Unknown on 2:14 AM Rating: 5

Scientists sharing Omicron data were heroic. Let’s ensure they don’t regret it | Jeffrey Barrett Reviewed by Unknown on 1:14 AM Rating: 5

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The Observer view on the Omicron variant | Observer editorial Reviewed by Unknown on 11:14 PM Rating: 5

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Covid live news: UK, Germany and Italy detect Omicron cases; Israel bans all visitors Reviewed by Unknown on 6:14 PM Rating: 5

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