Following is a summary of current science news briefs. Spain briefly shuts part of airspace as Chinese rocket debris flies over Spain briefly closed the airspace over the northeastern region of Catalonia and three other regions on Friday, causing delays to around 300 flights, as remnants of a Chinese rocket passed by before hitting the ocean off Mexico's coast, authorities said. "Due to the risk associated with the passage of the space object CZ-5B through the Spanish airspace, flights have been totally restricted from 9:38 a.m. to 10:18 a.m. (0838-0918 GMT) in Catalonia and other communities," Catalonia's emergency service said…