An international team of scientists said on Thursday they had recorded sub-atomic particles traveling faster than light -- a finding that could overturn one of Einstein's long-accepted fundamental

Four Central Asian countries called on Monday for international help from governments and business in clearing toxic nuclear waste left over from the Cold War when they formed part of the Soviet Union.

Experts and officials from some 150 countries started talks on Monday on banning production of nine chemicals considered potentially dangerous but still used in farming and for other commercial purposes.

Aviation leaders called on Monday for a global carbon emissions scheme for their industry, arguing that an emerging patchwork of regional and national systems could bring more, not less, environmental damage.