This week, looking for a new hobby? We're exploring the science of handicrafts, including why knitting boosts wellbeing, the first textiles from 27,000 years ago, and the project that's knitting human tissue to make replacement blood vessels. Plus, in the news, novel insights into who gets severe COVID and what might cause Long COVID, the WHO arrive in China to probe for the origins of the pandemic, and the snakes that tie themselves in knots to climb trees... Like this podcast? Please help us by supporting the Naked Scientists