Trapping of a terahertz wave in a photonic-crystal slab and subsequent ‘capture’ through absorption are demonstrated. Over 90% of the wave lying within 17% of the centre frequency is absorbed ...

The Smithsonian’s National Museum of Natural History unveiled a stunning slab of quartz crystals today, Oct. 27. This is among the largest examples of quartz specimens on display in any museum in ...

A 7-foot-tall, 8,000-pound slab of quartz crystals found in the Ouachita Mountains was unveiled last week at the Smithsonian National Museum of Natural History.

Then, they mimicked seismic waves by placing the slabs into a machine that simulated the shaky motion of an earthquake. Afterward, they checked the quartz and found gold along its surface.

Scientists conducted lab experiments to test how gold nuggets form on quartz crystals. Layne Kennedy via Getty Images About 75 percent of gold mined on Earth comes from deposits found in the ...

WASHINGTON, D.C. — The Smithsonian’s National Museum of Natural History unveiled a stunning slab of quartz crystals on Oct. 27. This is among the largest examples of quartz specimens on ...