About 500 million years ago, not a single creature had a skull. Over time, these bony plates evolved into the structural marvels that vertebrates—animals with spinal cords, aka you, me, and your pug, ...

I recently read a fascinating book by Cambridge University zoologist Dr. Arik Kershenbaum called The Zoologist's Guide to the Galaxy: What Animals on Earth Reveal About Aliens—and Ourselves. I totally ...

Introduction -- Form vs function : what is common across worlds? -- What are animals and what are aliens? -- Movement - scuttling and gliding across space -- Communication channels -- Intelligence ...

A former CIA-linked physicist's comments about 'four alien species' have reignited UFO conspiracy theories online.

Claims of US government knowledge of multiple alien species resurface as former officials allege awareness, but Pentagon reviews find no evidence of extraterrestrial involvement.

The Predator, otherwise known as Yautja, is an ancient race of aliens with a complicated origin history. Like their alien opponents, the Xenomorphs, there are a few competing theories to investigate.

Introduction: Nonnative species in the world / David Pimentel -- The impacts of alien plants in Australia / Richard H. Groves -- Environmental and economic costs of invertebrate invasions in Australia ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life. Tardigrades—a type of invertebrate ...