雅思英语

AIR TRAFFIC CONTROL IN THEUSAAAn accident that occurred in the skies over the Grand Canyon in 1956 resulted in the establishment of the Federal Aviation Administration (FAA) to regulate and oversee th...

The meaning and power of smellThe sense of smell, or olfaction, is powerful. Odours affect us on a physical, psychological and social level. For the most part, however, we breathe in the aromas which ...

HOW DOES THE BIOLOGICALCLOCK TICK?AOur life span is restricted. Everyone accepts this as ’biologically’ obvious. ’Nothing lives forever!’ However, in this statement we think of artificially pr...

LAND OF THE RISING SUMAJapan has a significantly better record in terms of average mathematical attainment than England and Wales. Large sample international comparisons of pupils’ attainments since...

IS THERE ANYBODY OUT THERE?The Search for Extra-terrestrial IntelligenceThe question of whether we are alone in the Universe has haunted humanity for centuries, but we may now stand poised on the brin...

The Development of MuseumsAThe conviction that historical relics provide infallible testimony about the past is rooted in the nineteenth and early twentieth centuries, when science was regarded as obj...

Search begins for ‘Earth’ beyond solar systemStaff and agenciesWednesday December 27，2006Guardian Unlimited1.A European spacecraft took off today to spearhead the search for another “Earth” ...

Don‘t wash those fossils!Standard museum practice can wash away DNA.1.Washing，brushing and varnishing fossils — all standard conservation treatments used by many fossil hunters and museum curato...

Food agency takes on industry over junk labelsFelicity LawrenceThursday December 28，2006The Guardian1.Consumers are to be presented with two rival new year advertising campaigns as the Food Standard...

Sun‘s fickle heart may leave us cold25 January 2007From New Scientist Print Edition.Stuart Clark1.There’s a dimmer switch inside the sun that causes its brightness to rise and fall on timescales o...