Two Britons seem to be ageing in reverse after contracting a bizarre condition which is rapidly making them behave like kids. The two brothers - Matthew, 39, and Michael Clark, 42 - contracted terminal leukodystrophy in 2011. It usually only affects newborns and despite having jobs, both now behave much like toddlers, The Sun reported. Michael, an ex-Royal Air Force regiment member, is now thought to have a mental age of 10 and giggles constantly … full story