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Explorer Lost

Thirteen years ago, Chris Velten disappeared while retracing the travels of explorer Mungo Park in Africa. He hadn’t been heard from at all — until he sent a friend request.

"We Haven’t Been Able to Rule Him Out"

Nearly 20 years ago in a remote California town, a 16-year-old named Karen Mitchell disappeared. The case went cold, but last month local law enforcement started looking at it again after the arrest of a former resident: Robert Durst.

Dean is a contributing editor at Longform.

Lost at Sea

An investigation into the disappearance of a 24-year-old British cruise ship activity director from the Disney Wonder opens the strange and insular world of cruise employees, who vanish mysteriously at alarming rates.