Scientists in Germany have crafted “skyrmion bags” of light—complex vortex-like structures—on the surface of gold by cleverly manipulating how laser beams interact with nano-etched patterns. This unus ...

You'll earn decent rewards, and free checked bags can add value — but the card is more expensive than its competitors and lacks some perks you'd expect to find at this level. Many or all of the ...

Why is it important to know how much gold costs right now?