A young great white named Bella has made a headline-grabbing summer arrival off Cape Cod, Massachusetts. Fox Weather said Bella was detected near Nauset Beach after covering 246 miles over the past week, the longest seven-day total of any great white on OCEARCH's tracker this week. What happened? OCEARCH's public Global Shark Tracker placed Bella about 2.5 miles off Nauset Beach on Saturday, where her continued movement north is being closely mo…