Science puzzles no longer so puzzling
Solutions now exist for some of science’s bothersome brain teasers
![Parkes telescope](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/12/122615_box4.jpg?fit=860%2C460&ssl=1)
RIDDLE ME THIS In 2015, scientists discovered that some of the mysterious radio signals detected by the Parkes telescope, in Australia, originate on Earth.
Alex Cherney, Terrastro/Science Source