Scientists estimate that one fifth of the world's tropical rainforest was destroyed between 1960 and 1990.

Scientists estimate that within the next few decades, organism design will be sophisticated enough to accomplish tasks such as creating biofuels and lowering the levels of harmful substances in the atmosphere.

Scientists estimate that more than half of all the world's plant and animal species live in tropical rain forests.

Scientists estimate that the mountains surrounding the canyon rose at a rate of approximately one foot every 2500 years.

* Scientists estimate that it will take until the 29th century for radiation levels in areas directly contaminated by the Chernobyl disaster of 1986 to become safe for permanent human habitation again.

Scientists estimate the area's recovery time may be as long as a century.

Scientists estimate that there may be as many as 10, 000 different phytochemicals having the potential to affect diseases such as cancer, stroke or metabolic syndrome.

A detailed analysis by physicists at the Federation of American Scientists concludes that such an estimate would depend on the total number and overall efficiency of the centrifuges Iran has in operation, and the amount of low-enriched uranium it has stockpiled to serve as " feedstock " for a possible high-enrichment program.

Scientists estimate that there may be more than 100, 000 sites spread over 50, 000 km² of the Kimberley.

Scientists estimate that the system of roads in the United States impacts the ecology of at least one-fifth of the land area of the country.

Scientists estimate that there are only 80-100 Florida panthers alive in the wild, making them one of the most endangered large mammals in North America ( Foster and Humphrey, 1995 ).

Scientists estimate that trawling has damaged or destroyed 30 %– 50 % of the Norwegian shelf coral area.

Scientists estimate the host plants for this sharpshooter include over 70 different plant species.

Scientists estimate only 1 of 100 turtles live to become an adult.

Scientists estimate that the Mississippi River Delta loses a football field of land an hour -- over 1, 900 square miles since the 1930s, roughly the size of Delaware.

* Scientists Create Butterfly Hybrid-Creation of new species through hybridization was thought to be common only in plants, and rare in animals.

Scientists found that power plants and incinerators using fossil fuels were expelling mercury into the atmosphere, and it fell as rain or dust during droughts.

Scientists at Brooklyn Botanic Garden are undertaking a comprehensive study of the plants of metropolitan New York, called the New York Metropolitan Flora project, or NYMF.

Scientists in several large research programmes are investigating methods of limiting gene flow in plants.

Scientists are unsure of how these plants, including Pringle's aquatic moss and Carolina star-moss, have come to grow in the Appalachian Mountains far from their usual homes.

Scientists generally accept that petroleum formed from the fossilized remains of dead plants and animals by exposure to heat and pressure in the Earth's crust.

Scientists speculate that this pest was introduced via infested ornamental plants brought into the United States at this time.

Scientists often turn out to be idiosyncratic, too.

Scientists figure humans may be born with a fear of spiders and snakes, which are healthy phobias that up the odds of survival in the wild.

Scientists discount the existence of Bigfoot and consider it to be a combination of folklore, misidentification, and hoax, rather than a living animal, because of the lack of physical evidence and the large numbers of creatures that would be necessary to maintain a breeding population

Scientists discount the existence of Bigfoot and consider it to be a combination of folklore, misidentification, and hoax, rather than a living animal, because of the lack of physical evidence and the large numbers of creatures that would be necessary to maintain a breeding population.

In response, Christian Scientists say that Jesus never claimed to be God and even implicitly denied it in.

Scientists soon began to realize that the Great Auk was disappearing and it became the beneficiary of many early environmental laws, but this proved not to be enough.

Scientists once thought that organic compounds are or could only be created by living organisms.

Scientists critical of parapsychology state that its extraordinary claims demand extraordinary evidence if they are to be taken seriously.

Note: Christian Scientists, Quakers and the Salvation Army cannot be classified as specifically opposing infant baptism, since they generally do not observe baptism in any form.

Scientists can be motivated in several ways.

Scientists were able to mimic this ocular response using glasses, and speculate that a similar pair of glasses may be available for human use within two years.

It has been suggested that a similar oath should be undertaken by scientists, a Hippocratic Oath for Scientists.

Scientists theorized that silicon would be easier to fabricate, but few investigated this possibility.

Among the groups not considered to be separated brethren are " Jews, Mormons, Christian Scientists, Muslims, Buddhists, and other groups.

Scientists such as Jared Diamond in The Third Chimpanzee, and Morris Goodman of Wayne State University in Detroit suggest that the bonobo and common chimpanzee are so closely related to humans that their genus name also should be classified with the human genus Homo: Homo paniscus, Homo sylvestris, or Homo arboreus.

Scientists from poorer, emerging or developing democracies may mainly be given the role of collecting raw data.

Scientists, such as Gerardus Mercator ( 1569 ) and Alexander Dalrymple as late as 1767 argued for its existence, with such arguments as that there should be a large landmass in the south as a counterweight to the known landmasses in the Northern Hemisphere.

Scientists have recognized two classes of geological feature on Oberon: craters and chasmata (' canyons '— deep, elongated, steep-sided depressions which would probably be described as rift valleys or escarpments if on Earth ).

Scientists and physicians agree that the use of Comfrey should be restricted to topical use, and should never be ingested, as it contains dangerous amounts of hepatotoxic pyrrolizidine alkaloids ( PAs ).

Scientists of the United States National Research Council have taken the position that it should be assumed that microbial life exists in Lake Vostok and that after such a long isolation, any life forms in the lake require strict protection from contamination.