The content originally appeared on: CNN Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. CNN - Officials at Russia's space agency, Roscosmos, have opted to delay the launch of a spacecraft meant to replace one deemed not safe enough to transport astronauts after a second vehicle - a cargo ship - sprang a leak on Saturday, according to NASA. Once cleared, the replacement spacecraft,Soyuz MS-23, will transport three […]