Radio Telescope - Scintillating

She strung hundred and 20 miles of wire over two years to build her radio telescope. She was looking for characteristic wiggles, changes in this data as they studied a pulsar. The regularity of it, the exact distance between the pulses, is what made it seem really weird. And she saw that it tracted with a particular location in the sky. That's a great clue that tells you that it's from earth.