Earth Matters

5 cool facts about the beloved northern cardinal

You're never too old to climb a tree

Hubble snaps stunning pics of Veil Nebula

Earth's tiniest creatures loom large in hyper-realistic photos

Lion cubs take a hair-raising swim across a river

Finding peace with a pack, a trail and lots of time

12 astonishing facts about horses

A nation divided ... into perfect square miles

California delivers blow to SeaWorld's captive whale program

Hog-nosed rat with vampire teeth is scary cute

Why the next super telescope matters

Pluto has its own wild blue yonder