The puzzle of the instability of an air bubble's trajectory as it rises over water has been addressed by researchers.

MOSCOW (Reuters) -An ally of President Vladimir Putin warned NATO on Thursday that a defeat of Russia in Ukraine could trigger a nuclear war, while the head of the Russian Orthodox Church said the world would end if the West tried to destroy Russia. Such apocalyptic rhetoric is intended to deter the U.S.-led NATO military alliance from getting even more involved in the war, on the eve of a meeting of Ukraine's allies to discuss sending Kyiv more weapons.

From bearing the burdens of the Roman Empire to enabling trade over long distances, the humble donkey has been surprisingly influential.

The rise of virtual hiring and remote work have made it easier to swindle job seekers, and fraudsters see new opportunity in recent job cuts, authorities say.