The winter months slide slowly by. The sun begins to shine a little longer each day. The air grows a little warmer. The snow begins to melt and soak into the ground. The earth grows warm and wet and...
Dirty air and water kill animals
> Potomac River Fish Fish take water into their gills to breathe. If too much waste material is in the water, the fish are killed. Animals need clean air and water. Many animals cannot breathe...
Household pets
A pet is an animal friend that lives with you. It may be a big, friendly St. Bernard dog that licks your nose each morning to wake you up. Or maybe it's a fat little hamster that squeaks at you...
Hot and cold
A kangaroo rat's world is the burning hot desert. The desert is baked by the sun. The air above the sand is so hot it wiggles! During the day, a kangaroo rat sleeps in a cool, underground hole....
Sea animals
The sea is filled with many kinds of animals. Fish, crabs, oysters, snails, and most other sea animals stay under water all the time. But whales, dolphins, sea turtles, sea snakes, and others...
This amphibian
> The red-eyed tree frog is an amphibian. This is a looking page. It can show you many things about this frog, if you look carefully. See the frog's big, round eyes? They are on the very top of...
It’s an Amphibian
The European green toad is an amphibian. Did you ever see a big, fat frog? A frog is one of the animals that lives in water when it is a baby and on land when it grows up. We call these animals...
Which is the strangest fish?
> Mudskippers > Archerfish There are thousands of kinds of fishes. If you tried to choose the strangest fish in the world, you'd have a hard time. The mudskipper has a head like a frog and a...
Champion egg layers
Some fish don't lay eggs. Some fish lay a few eggs. Some fish lay thousands of eggs, and some fish lay millions of eggs. A mother herring may lay more than forty thousand eggs at a time. The eggs...
Learning about the sea
An oceanographer uses a device called a sonar to locate underwater sounds. Behind her is the underwater house she stays in. How long can you hold your breath under water? A few seconds? A minute?...