The problem of space junk and how we get rid of it

An estimated 130 million pieces of space debris are travelling in orbit at speeds of thousands of kilometres per hour. And to date, not a single piece has been recovered from space successfully. But several methods are in development to reduce the overpopulation of Earth’s orbit by man-made debris.

Professor emeritus Ralph Cooney joins the show to discuss why space junk is such a problem, and the top strategies currently being developed to deal with it — one of which is a giant harpoon.