Trapped in an ancient Egyptian tomb by criminals disguised as government officials, scientific adventurer Captain Atom and his team look for an escape route before the air runs out...
One of the aspects of the first Captain Atom series was that the science shown in the comic was extrapolated from "present-day" (1950s) scientific knowledge, so it was "educational".Sadly, both the writer and artist of the series are unknown.
And, yes, the shorts and bare legs were Captain Atom's standard garb, not just desert-wear...