Concept » Earth-0 appears in 367 issues.
The Cosmic Rod was developed by Ted Knight, the first Starman, to collect energy radiating from the stars.
The Cosmic Treadmill is a device created by Barry Allen. He used the treadmill to travel through time and eventually found the multiverse with it.
A human-guided one-man sub, it shares its nickname with his pilot and creator.
The artificial robot body of Cliff Steele, which hosts his brain, the last surviving piece of his original human body.
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