Ockels and Furrer present the floating 'Egg of Columbus'

ESA Payload Specialist Wubbo Ockels and his German colleague Reinhard Furrer (left) on the Shuttle Challenger during the German Spacelab D1 mission (30 October to 6 November 1985). Ockels presents the 'Egg of Columbus': the egg floats standing on its small side in 'zero gravity'. The fun-experiment implies a link to the future of manned spaceflight, with the Columbus laboratory being one of the major European contributions to the International Space Station then being designed.