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Advanced 
 is getting back to 
 with the testing of a satellite that is largely made from 
. The Woodsat is the 
 of engineer Jari Makinen, co-founder of a company called Arctic Astronautics. It is just 10cm cubed in 
. Mr Makinen tested his DIY 
 in the stratosphere. He attached it to a 
 balloon and it went to an 
 of 30km above Earth. As planned, the balloon exploded and Woodsat 
 parachuted back to Earth. All communications equipment survived the 
 conditions as it came back.