Watching out for vultures
Vitamin D-licious Mushrooms
Seeds of the Future
Tree Frogs
Fishy Sounds
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Koalas, Up Close and Personal
Slumber by the numbers
Storing Memories before Bedtime
Mind-reading Machine
Flightless Birds
Chemistry and Materials
The metal detector in your mouth
Hair Detectives
Cold, colder and coldest ice
Fingerprint Evidence
The hungry blob at the edge of the universe
Galaxies far, far, far away
Dinosaurs and Fossils
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Little Bits of Trouble
Power of the Wind
Pumping Up Poison Ivy
Finding the Past
If Only Bones Could Speak
Prehistoric Trips to the Dentist
Ancient Art on the Rocks
White Tip Sharks
Food and Nutrition
A Taste for Cheese
Healing Honey
In Search of the Perfect French Fry
GSAT English Rules
Order of Adjectives
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Human Body
A Long Trek to Asia
Spitting Up Blobs to Get Around
Foul Play?
Sea Urchin
St. Bernards
How children learn
Choosing a Preschool: What to Consider
What Not to Say to Emerging Readers
Dreams of Floating in Space
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Electric Backpack
City Trees Beat Country Trees
Sweet, Sticky Science
Fungus Hunt
Snapping Turtles
Komodo Dragons
Space and Astronomy
Planning for Mars
Witnessing a Rare Venus Eclipse
Unveiling Titan
Technology and Engineering
Smart Windows
Algae Motors
Crime Lab
The Parts of Speech
Problems with Prepositions
Countable and Uncountable Nouns
Adjectives and Adverbs
Charged cars that would charge
Reach for the Sky
Troubles with Hubble
Watering the Air
Arctic Melt
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Ancient Critter Caught Shedding Its Skin

Few people would want to ditch their skin, but some creatures have been doing it for hundreds of millions of years. An ancient fossil supplies the evidence for such skin shedding. Skin shedding, or molting, is common throughout a class of hard-skinned animals called arthropods. Three-fourths of all living and extinct species belong to the group, which includes crabs, insects, and scorpions. Arthropods get rid of their hard, outer skins in order to grow. You may have found empty insect shells lying around. Arthropod fossils date back many millions of years. Previously, scientists suspected that the creatures molted, because they had found arthropod fossils near fossils of empty skins. Now, finally, there's proof. For the first time, researchers from the Royal Ontario Museum in Toronto have found a fossil of a creature caught in the act of molting. The specimen is a type of animal called Marrella splendens, which is related to another type of ancient creature called a trilobite. It's 505 million years old. The researchers found the specimen among 25,000 other examples of this species collected from western Canada. Molting fossils are rare for a couple of reasons. For one thing, a newly molted creature has soft skin, making preservation difficult. On top of that, animals spend such a short time molting that the odds are against them being fossilized during the process. The new discovery, therefore, is a huge stroke of luck.E. Sohn

Ancient Critter Caught Shedding Its Skin
Ancient Critter Caught Shedding Its Skin

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