Biologist Douglas Gaffin of the University of Oklahoma investigated the 'fluorescence' and found that the creatures can 'sense' light using their tails. The creatures may to have evolved the ability to help them scuttle away under rocks. Gaffin's team 'blindfolded' scorpions, then tested them with various different colours of light - and found that the tails seemed to function like secondary 'eyes'.
The insects' shell works as a 'whole-body' sensor which relays information about light to the nervous system - so any part of a scorpion can 'see'. The cuticle (casing) may function as a whole-body light collector which relays information to the nervous system, the researchers wrote. Scorpions may use this information to detect shelter, as blocking any part of the cuticle could diminish the signal.
Frogs have very special skin! They don't just wear it, they drink and breathe through it. Frogs don't usually swallow water like we do. Instead they absorb most of the moisture they need through their skin.
Sometimes you'll find frogs that are slimy. This is because the frog skin secretes a mucus that helps keep it moist. Even with the slimy skin, these frogs need to stay near water. Toads on the other hand have tougher skin that doesn't dry out as fast, so they can live farther from water than most frogs.
Frogs shed their skin regularly to keep it healthy. Some frogs shed their skin weekly, others as often as every day! This looks pretty yucky...they start to twist and turn and act like they have the hiccups. They do this to stretch themselves out of their old skin! Finally, the frog pulls the skin off over it's head, like a sweater, and then (this is gross) the frog eats it!
On January 12, 2007, a 28-year old Californian woman died from drinking too much water. She took part in a water-drinking contest that was sponsored by a local radio show. Entitled "Hold Your Wee For A Wii," the contest promoters promised a free Wii video game machine to the contestant who drank the most water without urinating. The woman drank 2 gallons of water during the contest. When she and other contestants complained of discomfort, they were laughed at by the promoters and even heckled.
This tragic news story highlights the importance of understanding why drinking too much water can be dangerous to your health. Whenever you disregard your sense of thirst and strive to ingest several glasses of water a day just because you have been told that doing so is good for your health, you actually put unnecessary strain on your body in two major ways:
1.Ingesting more water than you need increases your total blood volume.
2.Your kidneys work overtime to filter excess water out of your circulatory system.
Forcing your body to accept a large amount of water within a short period of time can be fatally dangerous to your health. If you force large amounts of water into your system over a short period of time, your kidneys will struggle to eliminate enough water from your system to keep the overall amount at a safe level.
As your circulatory system becomes diluted with excess water, the concentration of electrolytes in your blood will drop relative to the concentration of electrolytes in your cells. In an effort to maintain an equal balance of electrolytes between your blood and your cells, water will seep into your cells from your blood, causing your cells to swell.
If this swelling occurs in your brain, you'll experience increased intracranial pressure - your brain will get squeezed because the flat bones that make up your skull don't provide much give. Depending on how much water your drink in a short period of time, you could experience a wide variety of symptoms, ranging from a mild headache to impaired breathing.
