Expedition: Being an Account in Words and Artwork of the 2358 A.D. Voyage to Darwin IV is a 1990 speculative evolution and science fiction book written and illustrated by the American artist and writer Wayne Barlowe.

None of Darwin IV's wildlife have eyes, external ears, hair, or jaws, and they bear little resemblance to terrestrial organisms.

Expedition garnered very favorable reviews, being praised particularly for its many illustrations and for the level of detail in the text, which serves to maintain the illusion of realism.

In the 24th century, the exploitation of the Earth's ecosystem has created an environment so toxic that mass extinctions have wiped out nearly most of its nonhuman animal population.

Aided by a benevolent and technologically superior alien race, the Yma, humanity begins to repair their ravaged world while simultaneously learning more about the universe around them.

When an uncrewed Yma probe discovers evidence of alien life on Darwin IV, the titular "expedition" is sent to investigate.

Barlowe presents his findings in a collection of paintings, sketches, field notes, and diary entries from his explorations of Darwin IV.

He details a variety of alien lifeforms such as "Gyrosprinters", "Arrowtongues", "Grovebacks", "Daggerwrists", "Skewers", "Emperor Sea Striders", and "Eosapiens".

[9] A review in The Vindicator described Expedition as a "lavish science-fiction bestiary", but stated that the "weird creatures lack the necessary aura of plausibility".

[11] The Publishers Weekly review also pointed out the bizarre nature of some of the creatures, stating that "while superbly executed, Barlowe's visualization of an alien world falls short imaginatively and is naturalistically unconvincing.

Many animals look like dinosaurs designed by a committee and discerning readers will suspect that Darwin IV wouldn't work as an ecological system, no matter how alien".

The lifeforms in Alien Planet are for the most part faithful to their depictions in the book; however, the expedition is conducted by sophisticated robotic flying machines instead of humans.