GENEVA, SWITZERLAND -  The World Health Organization said on Tuesday that fighters in conflict-ravaged Sudan had occupied the national public laboratory holding samples of diseases including polio and measles, creating an "extremely, extremely dangerous" situation. Fighters "kicked out all the technicians from the lab... which is completely under the control of...
NASA rover preparing to take first Mars rock samples
Analyzing samples will reveal whether they were formed by volcanoes or are sedimentary in origin
