The huge West Antarctic ice sheet is undergoing a glacially slow but unstoppable collapse, new studies show, and scientists say that means a bigger rise in sea level than previously thought.

Amanda Knox thinks it is “ridiculous” she has gained celebrity status since being jailed for murdering British student Meredith Kercher.

Mount St Helens, the volcano that blew its top with cataclysmic force in 1980, quietened down after spewing a plume of steam and ash – but only briefly.