The city of L''viv, founded in the late Middle Ages, was a flourishing administrative, religious and commercial centre for several centuries. The medieval urban topography has been preserved virtually ...

Sea ice data is updated daily, with a one-day lag. On occasion, there is data delay which is usually resolved within a few days. The orange line in extent and concentration images (left and middle) ...

Cenotes are the doorway to Mexico’s mysterious aquatic underworld and there are four main types: cave cenotes, open cenotes, semi-open cenotes, and underground cenotes, also called cavern cenotes.