PBS NewsHour’s “5 STORIES” serves up the most interesting stories from around the world that you may have missed. On this week’s episode: Egyptian researchers unearth a four-legged whale fossil Scientists discovered a new fossil of a previously unknown whale — one that had four legs and a powerful, raptor-like mouth that could rip prey to shreds. According to a study just published in the Proceedings of the Royal Society B, the 43 million-year-old fossil belongs to the Protocetidae group of extinct whales. These were creatures that could both swim and walk on land, offering scientists clues on how whales…