In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

Some sci-fi creatures are just monsters. This one has real depth, logic, and worldbuilding behind it. A closer look at an ...

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, ...