Other unknowns include the effect of climate change on cloud cover, which affects temperatures, and on hurricanes, though there is some evidence that hurricanes will become more intense, scientists say.
The tall, intense computer scientist joined the firm in 1989 and impressed Liu with his drive.
Despite the release of a flurry of new results in what is becoming an increasingly intense debate, scientists still have not reached a consensus as to whether the nation's most commonly used herbicide is harming amphibians in the wild.
The debate about cell therapy for Parkinson's may soon become more intense as scientists in Europe, in collaboration with colleagues in North America, are in final negotiations for a large European Commission grant to conduct a new fetal cell transplant trial.
Click here to watch Ridley Scott and Noomi Rapace discuss making Prometheus Noomi Rapace is well cast as Dr Elizabeth Shaw, an intense and driven scientist who nonetheless has absorbed a calm religious faith from her father and always wears a cross around her neck.
The University of Sussex has abandoned its controversial plans to axe its chemistry department following intense criticism from scientists across the country.
This assertion, though, is the subject of intense debate among scientists, said Orio Ikebe, an official in the bioethics section of Unesco.
After several years of intense deliberations among scientists, educators, government officials, sports leaders and athletes, the World Anti-Doping Code, a comprehensive set of international standards, was established.
In today's atmosphere of intense scrutiny of scientists who accept industry money, he said, he felt he had little choice.
His ideas led to intense debates among scientists in the 1950s and '60s, but he was ultimately able to influence the U.S. National Aeronautics and Space Administration NASAA) in undertaking the Apollo program of lunar exploration.
