An authoritative new study commissioned by the Department of Health has found no link between the measles, mumps and rubella (MMR) vaccine and autism. The department's director of immunisation, Prof David Salisbury, says he hopes the research will end any controversy about MMR.
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Ian Sample, the Guardian's science correspondent, looks at a new study that ranks areas of the world in order of their vulnerability to the effects of global warming.
Guardian columnist Polly Toynbee gives her reaction to plans by the housing minister Caroline Flint to force council tenants to go out and look for work.
It's Super Tuesday, and about half of all American voters decide which candidates they want to run for president. Our US correspondents Suzanne Goldenberg and Ewen MacAskill look at the states to watch.
It's also Shrove Tuesday, and our consumer affairs correspondent Rebecca Smithers reports from the Guardian canteen, where strenuous efforts are made to make the perfect pancake.
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