CHEMICAL COMMUNICATION AMONG INSECTS: PHEROMONES

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Even if they travel great distances away, ants never fail to find their way back to their nests, nor bees the way to their hives.
When danger threatens some insect larvae, they immediately come together for protection. At mating time, male and female insects of all species can easily find each other, even at considerable distances. These forms of behavior all take place thanks to communication between individuals. .

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from nautilus to submarine

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When a submarine fills its ballast tanks with water, the ship becomes heavier than water and sinks toward the bottom. If water in the tanks is emptied out by means of compressed air, then the submarine surfaces. The nautilus employs the same technique. In its body there is a 19-cm (7.48 in) spiral organ rather like a snail’s shell, inside which are 38 interconnected “diving” chambers. To empty out the water; it also needs compressed air—but where does the nautilus find the air it needs?

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a RED ROSE IN THE SKY: THE ROSETTE NEBULA

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A team led by Leisa Townsley, a senior Penn State University researcher in the field of astronomy and astrophysics, examined the Rosette Nebula using the Chandra X-ray telescope. They imaged hundreds of stars in the Rosette Nebula and determined that by crashing into one another stars produce gas at temperatures of 6 million degrees.

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man: the living machine

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The human body, a totally separate world of its own, resembles a living “machine.” Inside that machine there is equipment with a technology far superior to any advanced technology outside, specialized elements , fully equipped soldiers and many other systems. Every nerve cell possesses special units for transmitting data. All by itself, the brain is capable of performing the work of 4.5 million transistors that permit the transmission of data by the microprocessor in a good computer.

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