Venezuela's crisis is spilling across the border into Colombia as Marxist rebels and right-wing paramilitaries recruit migrants to strengthen their ranks, according to five Colombian military commanders.
Iran has created a grave situation and jeopardized global oil supplies with its aggressive behavior, Saudi Arabia's minister of state for foreign affairs said on Thursday, adding that the kingdom was consulting with allies on next steps.
Non-precious metal nanoparticles could one day replace expensive catalysts for hydrogen production. However, it is often difficult to determine what reaction rates they can achieve, especially when it comes to oxide particles. This is because the particles must be attached to the electrode using a binder and conductive additives, which distort the results. W […]