Here’s what you’ll learn when you read this story:For more than 50 years, scientists theorized that an electromagnetic wave could be reflected temporally—not just spatially. Scientists have been unable to confirm the existence of time reflection due to the amount of energy required to create a temporal interface. Using an engineered metamaterial scientists in New York City were able to successfully observe time reflections for the first time. Instead, time reflections occur when the entire medium in which an electromagnetic wave travels suddenly changes course. Well, more minute control of electromagnetic waves can vastly improve wireless communications and even lead to advancements in low-energy, wave-based computers.