Which African nation is the newest internationally recognized sovereign state?

South Sudan

Which Disney Pixar film introduces a scouting organization called Wilderness Explorers? Who starred as Walter Mitty in the 2013 film adaptation? What does Tony Stark famously say at the end of the first "Iron Man" movie? In soccer, what phrase indicates scoring three goals in one game by the same player? Which planet in our solar system has the hottest surface temperature?