"What you did yesterday will no longer work tomorrow," said Vice Adm. Oleksiy Neizhpapa, who commands Ukraine's naval forces.

Ukrainian Navy officers and business owners in the port city pondered what Kyiv could gain from a truce after it pushed back Russian vessels and resumed commercial shipping.

Divers in Burgas have mapped and described in detail some of the most interesting underwater sites on the Southern Black Sea coast, the Friends of the Sea – Burgas non-profit association said on ...

Scattered across an abyssal plain known as the Clarion-Clipperton Zone (CCZ) are polymetallic nodules that are a potato-sized ...