ACTION COMICS (1938) #387

« Even A Superman Dies! » Using the heat of a rainbow sun, Superman thaws out five frozen astronauts, encountered adrift in space. Trapped in the ice for five millennia, the astronauts are abuzz with questions, but Superman has no interest in providing answers. As he flies away, Superman disables a passing spacecraft, in order to get it to land, and rescue the astronauts. Superman breaks the time barrier, moving ever forward. 100,000 yeas ago, Superman had used a defective Legion time bubble to travel into the future, only to discover that he had aged for every year he had traveled.…