technologies make today’s cutting -edge informations communications technology. They all incorporate the work of now passed-away computer Guru, Steve Jobs. And he was not the first inventor of these things. From these facts, we can understand a new way of recognizing inventions. Who really invented a technoscientific artefact, and who made them widely available often do not coincide. Perhaps ...
There was a hope for a brighter future in the Taser gun. When inventor Jack Cover, who died Feb. 7 at 88, first conceived his controversial stun gun, he imagined a world in which danger could be averted without the use of deadly force. A nuclear physicist who studied at the University of Chicago under famous physicist Enrico Fermi, Jack Cover worked as a contract scientist on NASA's Apollo ...
was so nice having peace in GreenVille again, Hannah Heart decides to go shopping. As she passed by Gassy Gal’s Boutique, she abruptly stopped. Hannah Heart was in love with a beautiful new suit that was made out of polly petrol. She liked the suit so much, she didn’t care that it was from Petrol Pirate’s Factory. Hannah Heart bought the suit and wore it out of the store. A couple days ...
Furthermore, the latest supernova explosion (in the Large Magellanic Cloud) made dust clouds more visible as its light passed through them, and made it easier to calculate their distances. There's more dust in our own galaxy than the Large Magellanic Cloud, with little dust in the space between us.The news of dust rings around other stars seems to confirm the scientific hypothesis that solar ...
it trapped nitrogen(which, apparently, is easily trapped under such conditions). Then, as the billions of years passed, the nitrogen leaked out and formed the atmosphere.But that doesn't really answer the question. Where did the nitrogen come in the first place?Another suggestion : Saturn, like the other giant planets, has considerable ammonia in its atmosphere. Ammonia is made up of ...
because they move so quickly that it is next to impossible to get one's instruments into action before they have passed out of view. One close asteroid(or "Earth-grazer", as they are sometimes called) is asteroid number 4769. Very rapid work, including studies of previous passages, showed that it was a dumbbell-shaped object..Nowadays, of course, we don't have to depend on Earth-bound ...
Einstein devised his general theory of relativity. According to that theory, light rays ought to be bent if they passed near a very massive object, just as they are bent as they pass obliquely into glass.The difference is that while light is bent enormously by glass(refraction), gravitational pull bends light only exceedingly slightly. Even so, in 1919, during a total eclipse, it was ...
energy.Bohr got a Nobel Prize in 1922 for this but his theory was rather crude to start with, and, as the years passed, it was extended and refined to account for still finer points in the way atoms absorbed and emitted energy.Finally, in 1925, the Austrian physicist, Wolfgang Pauli, pointed out that no more than two electrons could be in exactly the same orbit, and those two could only co ...
grow in a totally unprecedented manner. Three days after its discovery had become a very bright oval. After a week had passed, it had spread out over a width of 10,000 miles, and after a month, it was 50,000 miles wide.At Oct. 23, the "Great White Spot" completely encircled Saturn and was the greatest atmospheric storm ever observed in the solar system.Perhaps the most satisfactory part of the ...
while, the hot spot gives rise to a volcanic eruption, creating a series of volcanoes, the older ones of which, having passed beyond the hot spot, are extinct.The Hawaiian islands have been formed over one of these hot spots, and the volcano on the island of Hawaii itself, the most recently formed of the group, is still active. Could a miniblack hole buried in the mantle serve as the source ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
