We've been inching closer to real-life invisibility cloaks for a bit now, but going full on Harry Potter in the Hogwarts library is probably still a ways off. The latest advancement in metamaterial-based vanishing tech from Iowa State University guards whatever it's placed on from cameras, according to a paper published in Nature. The naked eye? Not so much. And even those cameras can't hide it from a human viewing a video feed, only other machines or perhaps radar.
The researchers achieved this by embedding split ring resonators filled with galinstan into silicone sheets. Stretching those sheets is a form of tuning of sorts, and allowed the scientists to suppress certain radar waves up to about 75 percent. This type of tech could be used in a stealth fighter jet for example, as everything RF notes.