have wanted him to see.William Lipscomb, 1976 Nobel-Prize-winner in chemistry, says that he “no longer put my most original ideas in my research proposals, which are read by many referees and officials. I hold back anything that another investigator might hop on and carry out. When I was starting out, people respected each other’s research more than they do today, and there was less ...
research, they also work hard at making sex possible.Most land plants, even simple mosses, keep their eggs inside the original plant, and the sperm cells must travel through water or air to fertilize the eggs. If using air, more evolved plants package the sperm in pollen grains so they won't dry up. The various ways in which plants succeed with pollen is remarkable.The ancient order of ...
had been found by removing sludge and pouring quicklime into it, but later tests did not confirm the results of the original experiments. Scientists are still looking for ways to clean fresh water systems of PCBs.Dr. Curtis Olsen, with the U.S. Department of Energy, has recently mapped out the flow of contaminants in rivers, using radioactive tracers. It was thought that rivers were polluted ...
analyzed the 'melt inclusions' of SNC meteorites. These inclusions are tiny bubbles where water was trapped when the original rock was first formed from the lava, so they indicate how much water was inside Mars at the time it 'outgassed' through volcanoes after the crust of Mars first formed, 3.9 billion years ago.It seems that the interior of Mars was much wetter than had been thought, but ...
silicate mixtures that probably date from the time the solar system was first being formed by condensation from the original solar nebula. Some of the dust is, however, thought to be of a different origin from the rest. It may be that all comets have a complicated history we have yet to explore fully.Dust beyond our solar system can annoy astronomers, since dust clouds in the Milky Way galaxy ...
"mitosis," the DNA-containing chromosomes double, then the cell divides so that each daughter cell is exactly like the original.When the chromosomes of a cell don't double, the cell divides with a "haploid" complement of genetic material. This is called "meiosis" (from a Greek word meaning "to make less"). As a sperm fertilizes an egg, the double helix is restored, with a new mixture of genes ...
pieces turned around, and separate. The idea is to pick the drawing of scattered pieces that exactly represents the original puttogether puzzle. Artists and structural engineers, and even many doctors, are good at this. Machines are not.Soon robotic devices may be equipped with an optical, not an electronic visual system. The optics are complex, using laser beams to carry images of the test ...
years later the description doesn't seem far off to me, given the little I know about cockroaches and computers. My original remark was prompted by fond memories of Don Marquis' famous Archy, but that literary insect was intelligent because he was a poet whose soul had unfortunately "transmigrated" into the body of a cockroach. Real cockroaches are not poetic.Are there any similarities between ...
that lefties were more prone to various physical illnesses, to die sooner, and to have more accidents and injuries.The original gloomy research data is now under question. It seems that left-handedness was more likely to shorten life in people born before 1890, but not since. The tendency toward having accidents is a cloudy issue, too, for it depends a lot on the age and gender of the person, ...
travelling matt process)등을 활용해 표현했다.이중노출기법을 채택했을 경우에는 원래(original)화면과 노출이 균등한가를 고려한뒤 촬영에 임해야 한다. 왜냐하면 서로 다른 화면을 다른 장소에서 촬영하기 때문이다. 아무튼 이 방법은 합성의 결과를 현상이 끝난 후에나 알 수 있으므로 촬영에 어려움이 ...