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A Spider's Taste for Blood
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Between a rock and a wet place
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A Framework for Growing Bone
Hitting the redo button on evolution
Scientist Profile: Wally Gilbert
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A Classroom of the Mind
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2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
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Polar Ice Feels the Heat
Rodent Rubbish as an Ice-Age Thermometer
A Volcano's Deadly Ash
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Sea Otters, Kelp, and Killer Whales
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A Long Trek to Asia
Little People Cause Big Surprise
Your inner Neandertal
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Flounder
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Food for Life
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Moving Good Fats from Fish to Mice
GSAT English Rules
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Mastering The GSAT Exam
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Prime Time for Cicadas
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Secrets of an Ancient Computer
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The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
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Road Bumps
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Dreams of Floating in Space
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Tracking the Sun Improves Plant Pollen
Flower family knows its roots
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A Star's Belt of Dust and Rocks
A Planet's Slim-Fast Plan
Killers from Outer Space
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Model Plane Flies the Atlantic
Spinach Power for Solar Cells
A Light Delay
The Parts of Speech
Pronouns
What is a Preposition?
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Transportation
Revving Up Green Machines
Charged cars that would charge
Robots on the Road, Again
Weather
Warmest Year on Record
In Antarctica watch the heat (and your step)
Catching Some Rays
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Sea Turtles

Sea turtles (Chelonioidea) are turtles found in all the world's oceans with the exception of the Arctic Ocean, and some species travel between oceans. The Leatherback is the only sea turtle that does not have a hard shell, instead carrying a mosaic of bony plates beneath its leathery skin. Big Boys: The Leatherback Sea Turtle is the largest, measuring six or seven feet (2 m) in length at maturity, and three to five feet (1 to 1.5 m) in width, weighing up to 1300 pounds (600 kg). Most other species are smaller, being two to four feet in length (0.5 to 1 m) and proportionally less wide. There are seven types of sea turtles: Kemp's Ridley, Flatback, Green, Olive Ridley, Leatherback, Loggerhead, and Hawksbill. The Leatherback Sea Turtle (Dermochelys coriacea) is the biggest of all living turtles, reaching a length of over 2.7 m (8 ft) and weight of 900 kg (1,500 lb). The Leatherback Sea Turtle is found in all tropic and subtropic oceans. It is the only extant species in the genus Dermochelys and the family Dermochelyidae. One Special Turtle: This species has many unique features that distinguish it greatly from other sea turtles. Its shell lacks the bony scutes of other turtles, comprising mainly connective tissue. Its metabolic rate is about 3 times higher than one would expect for a reptile of its size; this, coupled with counter-current heat exchangers, the insulation provided by its oily body and large size, allow it to maintain a body temperature as much as 18 C (64 F) above that of the surrounding water. Some scientists hypothesize that the Leatherback might have some capacity to generate its own body heat (like a mammal), although reptiles in general have been defined as ectotherms ("cold-blooded") and are thought not to be able to do so. Peanut Butter and Jellyfish: The beak of the Leatherback turtle is specially hooked to help it bite jellyfish and its throat has backward-facing barbs to help it swallow them. These throat hooks have caused Leatherbacks problems - they swallow plastic bags, which look like the gelatinous animals they prey on, and these indigestible bags then clog up their throats, preventing them feeding and eventually killing them. Dead leatherbacks have been found with plastic bags, pieces of hard plastic, and monofilament fishing line in their stomachs. Who Needs a Map? Sea turtles have an extraordinary sense of time and location. They are highly sensitive to the Earth's magnetic field and probably use it to navigate. They live up to 189 years. The fact that most species return to nest at the locations where they were born seems to indicate an imprint of that location's magnetic features. The Ridley turtles are especially peculiar because instead of nesting individually like the other species, they come ashore in one mass arrival known as an "arribada" (arrival). With the Kemp's ridley this occurs during the day and on only one beach in the entire world. Their numbers used to range in the thousands but due to the effects of extensive egg poaching and hunting in previous years the numbers are now in the hundreds. Birds and Bees: After about 30 years of maturing, adult female Sea turtles return to the land to nest, usually on the same beach from which they hatched. This can take place every two to four years in maturity. They make from four to seven nests per nesting season. They dig a hole with their hind flippers and lay from 70 to 170 eggs in it (depending on the species) before covering it up and returning to the ocean. Tiny Turtle Troubles: Some of the eggs are unfertilized 'dummy eggs' and the rest contain young turtles. Incubation takes about 2 months. When the eggs hatch, these baby turtles dig their way out and seek the ocean. Only a very small proportion of them (at most 1 in 100) will be successful, as many predators are waiting to eat them.

Sea Turtles
Sea Turtles








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