phenomena

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01. The Northern Lights are a fascinating [phenomenon] which attract viewers from around the world.

02. There has been a [phenomenal] increase in the number of homes with personal computers in the last few years.

03. Einstein once asked: "How on earth are you ever going to explain in terms of chemistry and physics so important a biological [phenomenon] as first love?"

04. Singer Bette Midler once asked, "If sex is such a natural [phenomenon], how come there are so many books on how to do it?"

05. Science does not yet have all the answers to explain the [phenomenon] of black holes in space.

06. Apparently, there is a new fashion [phenomenon] in the U.S. - designer bullet-proof clothing.

07. Computer hacking, once a relatively rare [phenomenon] restricted to a limited number of computer experts, is becoming increasingly mainstream.

08. Because culture is shared, it is considered to be a social [phenomenon].

09. Over 750,000 people in Quebec now go to indoor tanning salons, a [phenomenon] which has resulted in a 205 percent increase in skin cancer in that province.

10. The high price of housing in large cities has produced the [phenomenon] of homelessness.

11. The rainbow is a [phenomenon] that can occur only when the sun is 40Ø› or less above the horizon, as in the morning or the late afternoon.

12. Halley's comet is named after Edmond G. Halley, who was the first to suggest that comets were natural [phenomena] of our solar system, in orbit around the sun.

13. It was physicist John Wheeler who discovered the black holes of outer space, and he named the [phenomenon] in 1967.

14. Marketing researchers have found what they call the 4-2-1 [phenomenon] in China, wherein four grandparents, and two parents save all their money to spend on the one child which families in that country are allowed to have.

15. Mirages are a common desert [phenomenon].

16. [Phenomena] such as earthquakes and hurricanes show us just how much power nature has.

17. Estimates of the number of child laborers are difficult to obtain because governments are not keen to measure a [phenomenon] which is not supposed to exist.

18. The water cycle on earth manifests itself through many processes and [phenomena], such as clouds and precipitation.

19. Mankind's consumption of the Earth's natural resources is proceeding at a [phenomenal] and alarming rate.{</charset>}