Gemstones like precious opal are beautiful to look at and deceivingly complex. As you look at such gems from different angles, you'll see a variety of tints glisten, causing you to question what color ...

Karahantepe is one of at least 20 sites dating to the Pre-Pottery Neolithic period, more than 10,000 years ago, that are being explored by archaeologists working in the Taş Tepeler, or Stone Mounds, ...

Metamaterials are engineered structures designed to interact with electromagnetic radiation in a desired fashion. They usually comprise an array of structures smaller than the wavelength of interest.