Metamaterials are engineered materials with properties not normally found in nature. These materials are capable of blocking, absorbing, enhancing, or bending waves, such as electromagnetics and acoustics, to achieve phenomena beyond what is possible with conventional materials. The physical and optical characteristic of the metamaterials are derived from their structure and architecture rather than the properties of its base materials. Rearranging the structure in response to external stimuli such as light, electrical signal, pressure, and heat, allows metamaterial to act as sensors, active components, and smart materials. The applications of metamaterials range from esoteric such as invisibility cloak to practical such as lightweight acoustic treatments that reduce low frequency vibration. With their ability to transform multiple industries, metamaterials have attracted the attention of researchers ‘in major universities and research centers globally. This issue of Newsletter is dedicated to most recent developments in Metamaterials