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Penguins
Swimming birds of the Southern Hemisphere.
Gymnosperms
Meaning "naked seeds," gymnosperms are plants that do not make...
Renewable Energy
Solar, wind, and hydroelectric power!
Baobab Trees
Don’t cut them down on this planet, Little Prince!
Earth from Space
Our precious blue marble, as seen from space.
Carnivorous Plants
These plants eat things! How cool is that?!
Cycads
Although they may look like small palm trees, cycads are actually...
Cacti
A sampling of the diversity of the cactus family (Cactaceae).
Passenger Pigeon
A once-populous bird hunted to extinction.
Honeybees
Honeybees: from flower to hive.
Liverworts
These non-vascular plants are almost as strange as their name!
Jellyfish
Jellyfish are mysterious, beautiful, and definitely not fish.
Aurora
The northern and southern lights, known respectively as the aurora...
Charles Darwin
Charles Darwin, the father of evolution.
Yuccas
Yuccas, Spanish daggers, and Joshua trees are all members of...
NASA’s 50 Most Memorable Photos
We scoured NASA’s databases for their best photos, and here is...
7 Wonders of the Natural World
Nature’s greatest hits.
The First Cloned Cat and Her Relatives
Why cloning doesn’t mean carbon copy.
11 Adorable Pocket-size Frogs
A look at some cute and colorful frogs
Global Warming
Global warming is one of the biggest threats to humanity. See...
Life
Life can be traced to fossils more than 3.4 billion years old....
Primates
We’re not monkeying around here! See photos of primates in this...
Cells
The cell is the fundamental unit of life. See images of cells...
Dogs
It’s a dog eat dog world out there, so take a break by looking...
The Human Skeletal System
No bones about it--you’ll love these images of the human skeletal...
Golgi Apparatus
The Golgi apparatus is one of the key organelles in animal and...
Savannas
Savannas aren’t the only things that are hot--check out the amazing...
Siberian Huskies
The intelligent and graceful Siberian husky is also noted for...
Cows
The Polled Hereford. The Guernsey. The Brown Swiss. See images...
Homo Erectus
Homo erectus is possibly an ancestor of modern humans. See what...
Australopithecus
Australopithecus was a group of primates that are closely related...
Mountains
There’s no mountain high enough to keep us away from presenting...
Rivers
Keep rolling, rolling, rolling on down to these amazing river...
Homo Sapiens
People are people, so click here and see some images of Homo...
Homo Habilis
Homo habilis was the most ancient species of the human genus....
Protozoans
Protozoans may be small, but you will see plenty of details in...
Butterflies
From caterpillar to chrysalis to butterfly, this incredible insect...
Comets
Comets have captured the attention of astronomers for centuries....
Coral
Cool, colorful coral! From stony to staghorn, blue to black,...
Eagles
The eagle has been an enduring symbol of war and imperial power...
Frogs
Is a blue arrow-poison frog really blue? What does a tomato frog...
The Solar System
From Mercury to Neptune, meteorites to Moon rocks, there’s a...
Meteorites
Why study meteorites? How do scientists date them? Learn much...
Mosquitoes
This bloodsucking bug can make you itch--and get you sick. Find...
Stars
There are--get this--tens of billions of trillions of stars in...
Orangutans
Hang out with these orangutans and see where you’d be most likely...
Owls
A symbol of both wisdom and darkness, the owl is in many ways...
Sharks
Few things strike fear in the heart of a swimmer like this frightful...
Tornadoes
What makes tornadoes turn? Why do they cause such damage and...
Caterpillars
What’s that six-eyed creature creeping around this photo gallery?...
Whales
Whales are the heaviest known animals--and have a heavy history,...
Lions
Lions at rest and lions at play--learn more about what makes...
Cheetahs
These quick cats are one of the most recognizable creatures on...
Crocodiles
What’s that peering out at you from this image gallery? It’s...
Turtles
From turtles to tortoises to terrapins, here’s everything you...
Glaciers
What makes a glacier, a glacier? Where are they? And where have...