NASA poised to launch Mars atmosphere probeWhat happened to the water on Mars? How did the Red Planet's atmosphere become so thin over time? NASA's MAVEN probe is scheduled to launch Monday on a mission to find out.
India, Iran looking to resolve oil tanker dispute New Delhi and Tehran were Saturday working to resolve a dispute over the detention of an Indian oil tanker by Iranian naval guards for allegedly polluting sea waters in the Persian Gulf.
Environmentalists warn of Nicaragua canal disaster A proposed Nicaraguan waterway rivaling the Panama Canal would cause an environmental disaster threatening drinking water supplies and fragile ecosystems.