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Sweet Dolphin Dreams

Imagine if your breathing wasn't an automatic response. That might work during the day. But what about when you went to sleep? You wouldn't get a good night's sleep if you had to wake up every few minutes to consciously take a breath. Luckily for humans, and most mammals, breathing is regulated by our autonomic or involuntary nervous system. ...

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DolphinDreams
Biology

Heady Success

Hammerhead sharks might strike you as strange: or, they might just strike you. Among the oddest-looking of sharks, all nine types of hammerheads sport heads with sides stretched wide, like the head of ... Continue reading

HeadySuccess
Biology

The Journey of the Monarchs

The life of Monarch butterflies is an amazing one. They develop as caterpillars from the roughly 400 eggs each mother lays on the underside of milkweed plant leaves. Then they spend their brief lives ... Continue reading

MonarchButterflies
Biology

I Am The Walrus

The walrus is a member of the pinniped family, which also includes sea lions and seals. Walrus differ from some seals in that they can turn their hind limbs forward. This characteristic enables them ... Continue reading

IAmTheWalrus
Astronomy

Nursery of Giants Captured in New Spitzer Image

Typically, the bigger something is the easier it is to find. Elephants, for example, are not hard to spot. But when it comes to the massive stars making up the stellar nursery called DR21, size does ... Continue reading

GiantsSpitzerImage

When Chlorine Met Sodium...

WhenChlorineMetSodiumSodium is a required element in human physiology. The eleventh element in the periodic table, sodium is a soft, silvery white metal that can be easily cut through with a paring knife. It is highly reactive, and reacts readily and vigorously with water to produce sodium hydroxide, giving off a great deal of heat in the process. It would react as vigorously and more with body fluids and stomach acid.

Chlorine is a required element in human physiology. The seventeenth element in the periodic table, chlorine is a pungent, yellowish-green gas that has been used as an agent of chemical warfare. It causes blindness on contact, blistering, pulmonary edema, and destroys the lining of the lungs. It is commonly used as a bleaching agent because of its ready ability to eliminate unwanted colors and odors by destroying the molecules responsible for them.

When metallic sodium and chlorine gas are allowed to come into contact with each other, a very energetic reaction occurs in which the sodium metal actually bursts into flame. The union of these two elements produces one of the most innocuous materials known: sodium chloride, common table salt.