So far the AstroNuts have failed to find a suitable planet, but NNASA has come up with a new plan: send the the four animal astronauts back through time on Earth where they are to contact early Homo sapiens and somehow set them on a path to a sustainablefuture--trouble is, humans seem inferior to many of the other species (especially the wolves), so the AstroNuts come up with a Survival of the Fittest Olympics, hoping that with a little help the humans...

"Frank Einstein (kid-genius, scientist, and inventor) and his best friend, Watson, along with Klink (a self-assembled artificial-intelligence entity) and Klank (a mostly self-assembled and artificial almost intelligence entity), once again find themselves in competition with T. Edison, their classmate and archrival, this time studying the science and mysteries of the universe!"--

"Frank Einstein (kid-genius, scientist, and inventor) and his best friend Watson, along with Klink (a self-assembled artificial-intelligence entity), and Klank (a mostly self-assembled and artificial almost intelligence entity), once again find themselves in competition with T. Edison, their classmate and archrival--this time in the quest to unlock the power behind the science of the human body"--

Carbon dioxide is out of control on Earth, and the fate of humankind rests in the paws of four experimental, untested Animal Astronauts (AlphaWolf, SmartHawk, LaserShark, and StinkBug) who are seeking another habitable planet; first destination is the Plant Planet which at first looks perfect, except that the abundant plant life can think for itself--and it thinks that it really does not like the AstroNuts.

As soon as Jack Truck wakes up he gets the other trucks in line, but somehow he misses Pete.

On their second mission to find another habitable planet, the four mutant animals, LaserShark, AstroWolf, SmartHawk, and StinkBug, splash land on the Water Planet, run by some suspiciously friendly clams, who are very eager to swap planets--and if the AstroNuts can stop arguing among themselves they may find out why before it is too late.

Melvin the cement mixer worries when he cannot figure out who gave him a valentine.

On his first day at Brooklyn's P.S. 858, fifth-grader Michael K. is teamed with two very strange students, and while he gradually comes to believe they are aliens who need his help, he has trouble convincing anyone else of the truth.

Kat, who loves to make maps of all sorts of places and things, gives a special map to Jack.

Alex, whose birthday it is, hijacks a story about Birthday Bunny on his special day and turns it into a battle between a supervillain and his enemies in the forest--who, in the original story, are simply planning a surprise party.