do fish drink water

Water everywhere and not a drop to drink.” Talking about the sea, of course. Each 100 pounds of seawater contains almost 4 pounds of salt. You can’t drink that. What do marine mammals such as dolphins, manatees, orcas, seals and whales drink?
Marine mammals do not actually drink. They get all the water they need from the fish that they eat. The fish they eat do drink the sea water – lots of it – which is processed through diffusion and osmosis
Marine mammals in captivity that for some reason are not eating are fed freshwater from a pipe or bottl


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what your handwriting means

If letters slant to the left: Indicates introspection and a lot of emotional control.

If letter slant to the right: Reveals a person who’s outgoing, friendly, impulsive, and emotionally open.

If letters are straight up and down: The sign of someone who’s ruled by the head, not the heart.

Letters that slant in more than one direction: Indicates versatility and adaptability.
An erratic slant: Usually means a lack of flexibility.
Heavy pressure writing (like you can feel the rib made on the back of the paper): The writer is agitated.
Moderate pressure (the writing is dark, but you can’t feel the rib on the other side of the paper): Shows ability to deal with stress.
Light pressure: Indicates someone who seems to take life in stride.
Tiny letters: Indicate the writer is has somewhat low self esteem but is intelligent.
Small letters: The hallmark of quiet, introspective types – they’re generally detail-oriented and have good concentration.
Large letters: Sign of a confident, easygoing individual.
Huge letters: Indicate someone who’s theatrical, usually loud, and needs to be the center of attention at all times.
Wide letters (their width and height are about the same): The mark of someone who’s open and friendly.
Narrow letters: Show someone who’s somewhat shy and inhibited but very self-disciplined.
Letters that don’t touch: Indicate an impulsive, artistic, sometimes impractical free thinker.
Some letters connecting: Means the writer’s personality blends logic and intuition.
All letters making contact: The sign of someone who’s highly cautious.
A curved first mark: Shows a person who’s traditional and plays by the rules.
A straight beginning stroke: Reveals someone who’s rigid and doesn’t like being told what to do.
A final stroke straight across: The writer is cautious.
An end mark that curves up: Reveals generosity.
Perfect penmanship: The hallmark of a communicative person.
An indecipherable scrawl: Indicates a person who’s secretive, closed-up and likes to keep his thoughts to himself.

facts about your body

The length from your wrist to your elbow is the same as the length of your foot.
Your heart beats 101,000 times a day. During your lifetime it will beat about 3 billion times and pump about 400 million litres (800 million pints) of blood.
It is impossible to lick your elbow. Well, for almost everyone… but a few can.
Your mouth produces 1 litre (1.8 pints) of saliva a day.
The human head contains 22 bones. More on the head and brains
On average, you breathe 23,000 times a day.
Breathing generates about 0.6g of CO2 every minute.
On average, people can hold their breath for about one minute. The world record is 21 minutes 29 seconds, by David
Merlini.
On average, you speak almost 5,000 words a day – although almost 80% of speaking is self-talk (talking to yourself).
Over the last 150 years the average height of people in industrialized nations increased by 10 cm (4 in).
In the 19th century, American men were the tallest in the world, averaging 1,71 metres (5’6″). Today, the average height for American men is 1,763 m (5 feet 9-and-half inches), compared to 1,815 m (5’10″) for Swedes, and 1,843 m (5’11″) for the Dutch, the tallest Caucasians.
The tallest nation in the world is the Watusis of Burundi: 1.98 m (6 feet 6 inches) tall.
If the amount of water in your body is reduced by just 1%, you’ll feel thirsty.
It is impossible to sneeze and keep one’s eyes open at the same time.
55% of people yawn within 5 minutes of seeing someone else yawn.
Hippocrates, the Father of Medicine, suggested that a woman could enlarge her bust line by singing loudly and often.
A person can live without food for about a month, but only about a week without water.
You’ll drink about 75,000 litres (20,000 gallons) of water in your lifetime.
After a certain period of growth, hair becomes dormant. That means that it is attached to the hair follicle until replaced
by new hair.
Hair on the head grows for between two and six years before being replaced. In the case of baldness, the dormant hair was not replaced with new hair.
Men loose about 40 hairs a day. Women loose about 70 hairs a day.
In the Middle Ages the length from the tip of the middle finger to the elbow was called an ell.
A person remains conscious for eight seconds after being decapitated.
The first successful human sex change took place in 1950 when Danish doctor Christian Hamburger operated on New Yorker George Jorgensen, who became Christine Jorgensen.
The muscle that lets your eye blink is the fastest muscle in your body. It allows you to blink 5 times a second.
On average, you blink 15 000 times a day. Women blink twice as much as men.
A typical athlete’s heart churns out 25 to 30 litres (up to 8 gallons) of blood per minute.
24 of the known 118 elements are found in your body – see What the average human body contains
We have four basic tastes plus umami. The salt and sweet taste buds are at the tip of the tongue, bitter at the base, and sour along the sides; umami is a mixture of tastes sensed along the center of the tongue.
Not all our taste buds are on our tongue; about 10% are on the palette and the cheeks.
Unless food is mixed with saliva you cannot taste it.
The liver is the largest of the body’s internal organs. The skin is the body’s largest organ.
On average a hiccup lasts 5 minutes.
Fingernails grow nearly 4 times faster than toenails.
Your middle fingernail grows the fastest.
Your finger nails grow at 1 nanometre per second (0.000 000 001 m/s). Your hair grows at 4 nanometres per second (0.000 000 004 m/s).
It takes about 3 months for the transplanted hair to start growing again.
About 13% of people are left-handed. Up from 11% in the past.
In 1900, a person could expect to live to be 47. Today, the average life expectancy for men and women in developed countries is longer than 70 years.
A newborn baby’s head accounts for one-quarter of its weight.
King Henry I, who ruled in the England in the 12th century, standardized the yard as the distance from the thumb of his outstretched arm to his nose.
The bones in your body are not white – they range in color from beige to light brown. The bones you see in museums are white because they have been boiled and cleaned.
Our eyes are always the same size from birth.
Every person has a unique tongue print.
If all your DNA is stretched out, it would reach to the moon 6,000 times.
Approximately two-thirds of a person’s body weight is water. Blood is 92% water. The brain is 75% water and muscles are 75% water.
The colored part of the eye is called the iris. Behind the iris is the soft, rubbery lens which focuses the light on to a layer, called the retina, in the back of the eye. The retina contains about 125 million rods and 7 million cones. The rods pick up shades of gray and help us see in dim light. The cones work best in bright light to pick up colors.
We actually do not see with our eyes – we see with our brains. The eyes basically are the cameras of the brain.


See: Fast facts about your body

do you know why insects have antennae

We have noses which help us smell the world around us. Insects use their antennae or much the same purpose. Although our noses are quite sensitive, insects have a much stronger sense of smell.

 The female emperor moth gives out tiny amounts of chemicals called pheromones . using this antennae, the male emperor moth can smell the pheromones almost two km away!!!  His antennae are large and feathery, which improves his ability to smell.

Crickets, the insects you can hear on summer evening have long thin antennae which they use to search for food. To make sure that the antennae work at peak efficiency most insects spend a lot of time cleaning and grooming them

prevent earthquakes

Do you know how can we prevent earthquakes??

Earthquakes are among the worst natural disasters. Thousands of people die in severe earthquakes when entire cities, town, and farm would land s are destroyed. If we ccould predict earthquakes, it would be possible to move people and valuable  to safer  places before the damage took place china has suffered some terrible earthquakes and scientist  there are always searching for different ways to forecast them. In 1975 , they were dramatically successful they cleared the city of haicheng two hours before an earthquake struck. But we still do not have  a foolproof method prediction

Earthquake create small tremors which can act as an advance warning. Changes also occur in the electric and magnetic properties of rocks and often gas called radon is released. Radon dissolves in water, so if the radon content of lake or well water increases, an earthquake may well be on its way.

Some people reports that dogs howl, animal run from building and fish thrash about in water before an earthquake. Could they sense something we cannot?????

DO YOU KNOW HOW PEARLS ARE FORMED?

                                           

Oysters are shellfish that live on sea and river beds. When they are hungry, they open their shell and draw in water, containing small edible creatures.

Something a tiny piece of sand may get trapped inside the shell. This irritates the oyster just as a dust particle may irritate your eye. This stimulates the oyster to stimulate called “mother of pearl”

This coats the sand particle smoothly so that it cannot hurt the oysters soft body. It coats the tiny particle upon the layer of this shiny substance until finally a beautifull pearl is formed. Most pearls today are cultured. This means that a grain of sand has been deliberately put inside the shell, forcing the oyster to form a pearl.

do you know ?? the natural world

   do you know which animal apart from bird can fly?

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we all know that birds can fly. so can insects, but there are many other creatures which can also fly.

  Bats are instance are mammals which are capable of true flight. several species of flying fish can be found in the indian and atlantic oceans. but they donot really fly like birds. they merely glide over the water for long distance. some tropical frogs have large webs of skin streched between their fingers and toes. they jump from tree to tree and glide using thewebbed skin as parachute. the golden tree snakes of malaya takes off from the tops of tree and sail. the flying squirrel has flaps of skin on its undersites which it uses to glide from tree to tree.