You may think that anything uploaded onto the internet is there forever—but the constant churn is a challenge to the archivists trying to backup the web.

Even in this era of cloud storage, many data centers still use good, reliable magnetic tape. But as the technology develops at a faster rate, this backup is quickly becoming obsolete. What will become of the forgotten data preserved on the tape of the past?

More than two decades ago, a geologist traveled to Argentina to hunt for hidden craters. What he uncovered could change how we look for extraterrestrial life.