>>20000267

>>20000274

https://www.optica-opn.org/home/newsroom/2020/may/laser_altimetry_reveals_shrinking_ice_sheets/?fbclid=IwAR0I0ojzkazJrk0wRvUp5sxHo2NlsPUqtAO4AscOagqsVHlejnVIFgA1Ap8