There's a 26% annual chance that space rocket junk will re-enter the atmosphere and pass through a busy flight area, according to a UBC study. The study is published in the journal Scientific Reports.

Some high-density airspace regions could have as high as a 26% of being affected by an uncontrolled rocket body reentry.

"What if the iron stones were warming up to the point where they would actually melt the glacial ice beneath them and sink ...