RT @EconSciTech: Pseudo-satellites: high-tech – 21km high – but launched by hand econ.trib.al/upCYSXD http://t.co/fVwz5VLq0s
RT @EconSciTech: Pseudo-satellites: high-tech – 21km high – but launched by hand econ.trib.al/upCYSXD http://t.co/fVwz5VLq0s