While working in my yard and enjoying this amazing fall weather, the sounds of birds were a welcome delight. I love to hear the chirping and singing of various birds on my wooded property. I may not ...

A Black-capped Chickadee, a year-round bird in Milwaukee, perches on a branch at the Schlitz Audubon Nature Center. With the sun shining a little more lately, you may have noticed more birds chirping ...

Birds do it and so do doughnut-shaped fusion facilities called 'tokamaks.' But tokamak chirping -- a rapidly changing frequency wave that can be far above what the human ear can detect -- is hardly ...