The principle of neutral buoyancy is used to simulate the weightless environment of space. Ballon, which is the appearance of effortless and weightless movement, is another important aesthetic. As in fly-fishing, it is the tenkara line that propels the weightless fly forward. Such a body would then be stress free and be classed as weightless. Despite their enormous weight, the domes appear virtually weightless. The dearth of solid material allows aerogel to be almost weightless. Pointe technique resulted from a desire for female dancers to appear weightless and sylph-like. When his daughter is unearthed she is found to be still intact and completely weightless. Alex Suarez of Cobra Starship remixed "Weightless". Both spiders took a long time to adapt to their weightless existence. Imagine the same spring and object in a weightless environment. Another three experiments studied the formation of interferon in human cells under weightless conditions. They withstood accelerations of 38 "g" and were weightless for about nine minutes. EVA training for Kibo takes place in the Weightless Environment Test System (WETS). It came in 5th place among surveyed songs behind Marconi Union's "Weightless".