Our latest Please Explain is about invisible currents that exist all around us with Bob Berman, author of the book Zapped: From Infrared to X-Rays, the Curious History of Invisible Light. Do you have questions about x-rays or microwaves? Wondering about the upcoming solar eclipse on August 21? Write to us in the comments section below, or send us a question on Twitter or Facebook! Jonathan Capehart guest hosted this segment of "The Leonard Lopate Show."