Announcing a new UKSP nugget ''The magnetic Kelvin-Helmholtz instability at the Sun" by Claire Foullon has been published at http://www.uksolphys.org/nuggets/uksp-nugget/8-magnetic-kelvin-helmholtz-instability-at-the-sun/ New SDO/AIA images show ripples on CMEs, like the Kelvin-Helmholtz instability in clouds on Earth. Lyndsay Fletcher and Iain Hannah