Bowel cancer samples that have been stored for up to a century will be analysed to try to solve the mysterious rise of the disease in young people. Despite the majority of bowel cancers still being found in older adults, the rise in younger patients has been seen around the world. This includes in the UK where bowel cancer rates have increased by 75% in the under-24s since the early 1990s - but scientists are unclear why. Scientists at St Mark's The National Bowel Hospital are now going through