There is no up or down for this worm.
Acmella nana measures only half a millimeter wide and about 0.70 millimeters high.
How a Canadian city is planning to become a world-class centre for wolf-positive research, education and eco-tourism.
In a time when women were expected to be homemakers, Marianne North was a globetrotting adventurer.
You should probably just watch the video.
New research shows there are 3 trillion trees, but it's still not good news: there used to be 6 trillion.
Learn all about the mammals of "Grand Theft Auto V."
The great paleontological debate is over.
Each color represents the out-of-control behavior of different cell types.
Unusual tool use by a female capuchin has surprised researchers.