A NEWLYWED ageing at twice the normal rate is refusing to let her condition slow her down. At 30-years-old, Challi Muguira is one of the oldest surviving people with progeria in the world. Progeria is a rare genetic disorder characterised by premature ageing, growth delay, short stature, small face and hair loss. Challi, from Baton Rouge, Louisiana, has a rare form, which was so unusual that it took doctors 16 years to formally diagnose her. Her form of progeria is different from the classic form and she does not age at quite the same rate, but is still mistaken for someone who is decades older. After meeting her partner online, Challi tied the knot with the love of her life in November 2017.