China begins operating world's largest radio telescope

The world's largest radio telescope began searching for signals from stars and galaxies and, perhaps, extraterrestrial life Sunday in a project demonstrating China's rising ambitions in space and its pursuit of international scientific prestige.

Beijing has poured billions into such ambitious scientific projects as well as its military-backed space program, which saw the launch of China's second space station earlier this month.

World's biggest cruise ship sets sail from France

Tens of thousands of French well-wishers waved goodbye to the largest cruise ship in the world as it set sail on its maiden voyage to the U.K. after 32 months in a French shipyard.

The $1 billion Harmony of the Seas cut a gargantuan silhouette Sunday as it left the western port town of Saint-Nazaire.