When we last checked in on Mark Rober, the NASA engineer turned actually-really-entertaining YouTube guy, he was risking life and limb to explore shark science with one of the Stranger Things kids.

An installation view of Nikita Gale’s “DRRRUMMERRRRRR” as part of "Impossible Music" at Tufts University Art Galleries. (Courtesy Mel Taing) A striking display distinguishes the entrance to Tufts ...