You Can See Invisible Things - Roger Meyer

Lots of things are invisible to our eyes. For example, we cannot see gravity, radio waves, or sound. In the world of make-believe, magic cloaks or rings can make one invisible. In science fiction, cloaking devices make spaceships invisible. Scientists work with stealth technology to try to make things seem invisible, or as close as possible. But, what about the truly invisible things? Read the full commentary at https://www.tomorrowsworld.org/commentary/you-can-see-invisible-things