The six pups were born on Earth Day in April to parents Cirilla and Buckeye as part of a preservation program for the species ...

In "Thinking Like a Mountain," after killing a wolf in cold blood, Aldo Leopold raced with glee to fondle his kill. He reached her just "in time to watch a fierce green fire dying in her eyes.

Most spiders have eight eyes. In some species — mostly those that hunt for their prey, like wolf spiders — four of those eyes have a iridescent layer behind their retinas, called a tapetum.