Athens-based independent scholar Demetrius Savvides has shown that in Amphipolis, northern Greece, where the Kastas Monument ...

Painted on a wall tucked away in a quiet Marseille street, its beam aligned perfectly with the real-life shadow of a metal post on the pavement.

Above, fireflies light up the sky in upstate New York ... While exploring the Belgian countryside, he lifted a stone and found a treasure: the larvae of a common glow-worm, a firefly species ...