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Non-Flammable Fuel?

When we're flying high above the Earth, few of us give much thought to aircraft safety. We're usually too busy wondering when lunch is going to be served. But flying safely is a goal of NASA's Glenn Research Center (GRC) in Cleveland, Ohio. They're working on the problems that could arise if fuel in the tanks were to accidentally ignite in flight ...

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NonFlammableFuel
Biology

Why Tree Twig Twine Twists Tongues

Even though we call it a 'tongue twister,' it isn't really your tongue that has a hard time saying 'sixth sick sheik's sixth sheep's sick.' It's not all that rare for people to make mispronunciations ... Continue reading

TreeTwigTwineTwists
Astronomy

The Big Bang Model

The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few ... Continue reading

TheBigBangModel
Geology

You, Graphite and Diamonds

Living things, including you and me, and diamonds, are made of the same substance: the element carbon (C). Carbon atoms in our bodies are bound to other atoms, such as hydrogen and oxygen, in organic ... Continue reading

GraphiteDiamonds
Engineering

A New Twist on Fiber Optics

By twisting fiber optic strands into helical shapes, researchers have created unique structures that can precisely filter, polarize or scatter light. Compatible with standard fiber optic lines, these ... Continue reading

ANewTwistonFiberOptics

Lionfish Invasion

LionfishInvasionLionfish (Pterois volitans/miles complex) are beautiful, yet venomous, coral reef fish from Indian and western Pacific oceans that have invaded East Coast waters. Ironically, this species of lionfish is popular in large saltwater aquariums because of its brilliant maroon and white stripes and fan-like fins. However, beneath the fin's delicate exterior are venomous spines that are probably used for protection against predators.

Along the southeast United States, adult lionfish have been found at depths of 85 to 300 feet from Florida to North Carolina. Juvenile lionfish have also been observed in North Carolina, Bermuda and as far north as New York. NOAA scientists conclude that the large number of adults observed and the occurrence of juveniles indicates that lionfish are established and reproducing in coastal waters along the southeast United States. Furthermore, there is evidence that lionfish numbers are increasing.

Lionfish were likely first introduced off the Florida coast in the early to mid-1990s by intentional or unintentional release from the aquarium trade, including amateur home aquariums. There is no evidence suggesting that these lionfish derived from other common invasive species sources, such as ballast water dumping from the shipping industry, live-bait use by anglers or fouling on recreational boat hulls or semi-submersible oil platforms. Although it's still too early to predict the impact lionfish will have on the Atlantic coast, the damaging impacts of other invasive species have already left their mark on too many of the nation's valuable coastal ecosystems.