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Human probably used fire for warmth and protection before anyone ever thought of cooking. Tribes may have kept campfires through the night and if you leave that deer carcass close to the embers to protect it from 
hyenas,you might wake up to find the scorched end is much easier to chew. It isn't clear exactly when the 1st occurred ,but it was at least 100,000 years ago.
Cooking generally increase the availability of nutrients in food, and tribes that cooked would have had an immediate advantage. Heat also destroys certain toxins to make some otherwise poisonous plants edible. These may have initially been burnt as fuel and the roasted tubers found and eaten by a curious ancestor the next morning.
Its eminently possible. Although different animals normally have different genes and arrangements of chromosomes,the molecules or DNA and RNA are common to all living things.
Cell biologists can inserts DNA from 1 organism into the chromosomes of another using a variety of techniques , including viral vectors and physically injecting into the cell nucleus.
When animal embryos are injected with whole human stem cells. DNA from 1 organism has been shown to cross into the cells of the other. This has important repercussions for the way disease such as AIDS and flu are studied, especially how they emerge and spread.
Want to curb your drinking and eating habits? It might be easier that you think. Researchers Brian Wansink an Koert Van Ittersum from Cornell University asked students to pour a single shot of whiskey from a full bottle into a glass.
Those given a short, wide glass poured, on average , 30 per cent larger shots that those given a taller , narrower glass.
It would appear that people used the depth of the liquid as an indicator of the amount of liquid in the glass,not noticing , or not allowing for fact, that one glass was far wider that the other.
The researchers then repeated the experiment with experienced bartenders and discovered that they too poured, on average, 20 per cent larger shots into the short ,wide glass. If you want to reduce the amount you're drinking, then you'd be well advised to stay away from short, wide glasses and stick to tall narrow ones.
Dieting can also quick and painless. Placing a mirror in front of people when they are presented with different food options results in a remarkable 32 per cent reduction in their consumption of unhealthy food.
It seems that seeing their own reflection makes them more aware of the body, and more likely to eat food that is good for them.
Research shows that people become much happier after even the smallest acts of kindness. In an innovavtive study conducted by Elizabeth Dunn from the University of British Coloumbia, participants were given $20 and asked to spend the money thet evening. They were ramdomly assigned to one of two groups. One group was instructed to spend the money on themselves ( perhaps treating themselves to a self-indulgents present) while the second group was asked to spend their unexpected windfall on someone else( perhaps by purchasing a present for a friends or family member). Participants who spent the money on their family and friends ended up feeling sinificantly happier than those who treated themselves to luxury gifts.
Of course, you might argue that you really don't have enough money to donate to others. However, once again, help is at hand. Happiness researcher Sonja Lyubomirsky at the University of California, Riverside,arranged for a group of participants to perform five non-financial acts of kindness each week for six weeks. These were simple things , such as writing a 'thank you' note, giving blood, or helping out a friend. Some of the participants performed one of the acts each day, while other carried out all five on the same day.
Those who performed their kind acts each day showed a small increase in happiness at the end of the experiment. However, those that carried out all their acts of kindness on just one day each week increased their happiness by an incredible 40 per cent.
Hop! A green grasshopper shoots up out of the grass. It sails through the air and lands in the grass again. You can't see it before it jumps. And you can't see it after it comes down. Its green color helps it hide in the green grass.
An animal is hard to see if it is same color as the ground,rocks, or plants around it. A green caterpillar on a green leaf is hard to see, and so is a brown horned toad on brown sand. The caterpillar's color helps it hide from birds while it is eating. The horned toad's color helps it hide from birds and snakes while it looks for insects to eat.
The spots and strips that many animals have on their bodies help them hide. A giraffe's body is pale orange or white , with reddish-brown spots. When the giraffe walks among trees it seems to disappear. Its spotted body looks like spots of sunlight and shadow among the leaves.
A tiger's coat is orange-brown with black stripes. When the tiger lies in a field of brown grass striped with sun and shadow, it can't be seen. When another animal comes near enough, the tiger can jump out of hiding at it.
The color and designs on animal's body he;p it hide so it can get food or so it can keep from becoming food!
Do not be alarmed if pimples appear in the body since the organism has eliminate the poisons accumulated in it due to a faulty way of eating and drinking. If these strange substances are not excreted , the consequences would be fatal. When the body discharges the poison in the form of pimples, be happy for the body is having a general clean-up.
Treatment: Immediately adopt a vegetarian diet to help the organism eliminate its morbid loan. Wash the pimples frequently with horsetail or warm water. Apply warm flax compress to help the pimple ripen. You can also apply warm mud compress mixed with chopped onions and little honey. Everytime a compress is taken, wash the affected part tepid horsetail water.
Compress of coagulated milk also gives excellent results to absorbs poison and help the skin its eliminative function.
Flour compress , mashed with honey and water, placed on the pimples gives marvelous results to promote ripening and absorbs poison.
We insistently advice three cold 'Bath restorers' from 20 to 30 minutes everday and one alternative warm and cold ' Bath restorers' once a week to cleanse the body of impurities.
Billions and billions of tiny plants and animals live in the ocean. Most of them are so small they can be seen only with a microscope.
These tiny plants aren't like plants you have seen. Some look like square of jelly fastened together in chains. Some look like little balls. Some are like tiny anchors with threads hanging from them.
The tiny animals are strange looking, too. Some look like bells. Some look like light bulbs with six wiggly legs. Some of them are just little round balls. Many of these animals are babies of bigger animals, such as jellyfish.
All these animals and plants float in the upper part of the ocean. They are called plankton. Plankton is the most important food in the sea. It is often called the pasture of the sea.
Many kinds of baby fish eat plankton. So do many grown fish. So do many other sea animals. If suddenly there were no plankton,all these animals would die. And all the animals that eat them for food would then die. Soon there wouldn't be a single living things in any of the oceans.
That's why plankton is the most important food in the sea.
hyenas,you might wake up to find the scorched end is much easier to chew. It isn't clear exactly when the 1st occurred ,but it was at least 100,000 years ago.
