Kris Quintanilla has been camping at Goose Island State Park in Rockport, Texas, for 28 years, but he recently discovered ...

W hen you hop in your car to head to work, drop your kids off at school or make a Target run, how many traffic lights do you ...

Now, imagine you are a pilot flying a plane in the night. It is pitch black outside, and you see red and green lights blinking ... useful for locating people during pursuits or search-and-rescue ...