So far the AstroNuts have failed to find a suitable planet, but NNASA has come up with a new plan: send 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 sustainable future--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...

After Astrid tells her father that she wants to be an astronaut, he tells her of all the things that astronauts have to do.

The girls at Miss Bunsen's are excited at the news that Nova Celeste, the famous astronaut, is offering space camp scholarships to three lucky students. All the winning team has to do is invent a flying machine--in just a week! The girls don't have much to work with, but during a sewing class, they stumble across an incredible idea. But will it fly?

"In her third story, Luciana and her family are headed to Chile for winter break. Luci can't wait to see her cousins - but the reunion doesn't go as planned, and Luci feels like an outsider in her own family. Just then she receives a surprise invite from Claire Jacobs, her frenemy from astronaut training camp, to join her at the Mars habitat in the desert and watch NASA scientists at work. It's an offer too good to refuse, so Luci decides to leave...

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.

Illustrations and simple, rhyming text reveal the day-to-day lives of cow space explorers, from what they look like, to how they keep busy, to how they deal with a noisy baby.

"With national pride and valuable scientific research on the line, the CatStronauts race against the CosmoCats and others to be the first cats to Mars"--

"When Astronaut Randolph Witherspoon takes a walk--a space walk, that is!--he doesn't hear Ground Control's order to not talk to strangers and winds up making a new friend"--

A mouse stowaway on NASA's first human mission to Mars becomes a hero when one of the landing craft's engines fails. Includes facts about Mars.

"The CatStronauts--elite cat astronauts--are aboard the International Space Station to repair the faulty Hubba Bubba Telescope, but have to contend with communications interference and a near disaster that leaves them down a member"--