It Is the first day of 2026, the year that looked far away at the dawn of 2025, 12 months ago. It is now here and as I type this, I do so in awe of the unseen God, who rules in the affairs of men. If ...

Backward waves have recently attracted considerable interest in the context of photonic metamaterials 4, 5, where they form the basis for negative refraction 6 and underlie so-called perfect lenses 7, ...