They grow up so fast. Sandy and Luna pictured last week. Image: FOBBV Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. High above Big Bear Lake in southern California, a pair of eaglets’ eyesight is coming into focus. Sandy and Luna , the 2026 chicks of internet-famous bald eagles Jackie and Shadow, now boast vision abilities nearly equal to that of adult birds. According the Friends of Big Bear Valley (FOBBV), the non-profit organization responsible for the 24/7 live cam, the bald eagle chicks can now track objects like squirrels and airplanes in the distance. Viewers can spot Sandy and Luna bobbing their heads as they watch things move. “This ‘bobbing’ helps them calculate the exact distance and speed of moving objects,” FOBBV explains . This vision maturation typically occurs around 35 days old. The physical changes to their eyes take a bit longer— about five years .…