Space debris: 'Grandfather satellite' ERS-2 due to fall to Earth

"When I was a university student in the 90s, we were told that the ice sheets were very cold and stable, and they weren't going to change much; it would take decades before we saw any of the kinds of changes we expected to see as a result of climate change. And ERS really showed that this wasn't true, and that there were big changes happening already."