“Keys of Knowledge” was a series of educational pages at Gold Key Comics. This one from 1970 tells you enough about the piranha to make sure you never want to go swimming in a Brazilian river!
You’d think he would set about ruling the world, getting mega-rich, and having a harem of scantily clad hotties rubbing him down with chocolate sauce. But no, he becomes a kind of secret agent. Whatever!
Issue #6 was our favorite Brain Boy story for obvious reasons: He meets a giant dinosaur who reveals that Tyrannosaurs ruled the planet using super-intelligent telepathic control over other animals. Now, they’ve come back to life to reclaim the planet! Of course, atomic power is involved, just like with Godzilla or Reptilicus.
– From Brain Boy #6; Dell, 1963.