Protecting Cows—and People—from a Deadly Disease
Middle school science adventures
Flush-Free Fertilizer
Poison Dart Frogs
Frogs and Toads
Tree Frogs
Red Apes in Danger
Insects Take a Breather
Poor Devils
Talking with Hands
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
A Global Warming Flap
Chemistry and Materials
The chemistry of sleeplessness
Cooking Up Superhard Diamonds
The hottest soup in New York
Getting in Touch with Touch
The Book of Life
The Shape of the Internet
Dinosaurs and Fossils
Message in a dinosaur's teeth
An Ancient Spider's Web
Mini T. rex
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Easy Ways to Conserve Water
Petrified Lightning
In Antarctica watch the heat (and your step)
Indoor ozone stopper
A Vulture's Hidden Enemy
Little Bits of Trouble
Finding the Past
Meet your mysterious relative
Ancient Art on the Rocks
Unearthing Ancient Astronomy
Electric Catfish
Sting Ray
Food and Nutrition
The Color of Health
A Pepper Part that Burns Fat
Symbols from the Stone Age
GSAT English Rules
Order of Adjectives
Who vs. Whom
Who vs. That vs. Which
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2014 GSAT Results for Jamaican Kids
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Deep-space dancers
Human Body
A Fix for Injured Knees
Spitting Up Blobs to Get Around
Remembering Facts and Feelings
Giant Squid
Killer Whales
Woolly Mammoths
The Surprising Meaning and Benefits of Nursery Rhymes
How children learn
Raise a Lifelong Reader by Reading Aloud
Invisibility Ring
Gaining a Swift Lift
Road Bumps
Pumping Up Poison Ivy
Fastest Plant on Earth
Flower family knows its roots
Snapping Turtles
Space and Astronomy
Phantom Energy and the Big Rip
Sounds of Titan
A Darker, Warmer Red Planet
Technology and Engineering
Model Plane Flies the Atlantic
Musclebots Take Some Steps
Slip Sliming Away
The Parts of Speech
What is a Preposition?
What is a Verb?
Robots on a Rocky Road
Flying the Hyper Skies
Where rivers run uphill
The Best Defense Is a Good Snow Fence
Weekend Weather Really Is Different
Either Martians or Mars has gas
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Miscellaneous Mammals

Mammals are identified by a combination of warm blood, body fur or hair, and glands that produce milk to feed their young; beyond these few common traits, however, mammals are wildly diverse in shape, size, habitat and behavior. From our common domestic animals (dogs, cats, horses and goats) to their wild cousins (wolves, lions and gorillas) and including human beings, mammals make up a classification of animal as varied as people in the world. The mammals are the class of vertebrate animals characterized by the presence of mammary glands, which in females produce milk for the nourishment of young; the presence of hair or fur; and endothermic or "warm-blooded" bodies. The brain regulates endothermic and circulatory systems, including a four-chambered heart. Mammals encompass some 5,500 species, distributed in about 1,200 genera, 152 families and up to 46 orders, though this varies with the classification scheme. Phylogenetically, Mammalia is defined as all descendants of the most recent common ancestor of monotremes (e.g., echidnas and platypuses) and therian mammals (marsupials and placentals.)

Miscellaneous Mammals
Miscellaneous Mammals

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