One of opera's leading men, Italian tenor Vittorio Grigolo, was dismissed Thursday by two of the world's most prestigious houses: the Royal Opera in London and New York's Metropolitan Opera.

His firing comes after an investigation by the Royal Opera [RO], which determined that he had demonstrated "inappropriate and aggressive behavior" during an RO tour of Japan in September.

Thousands of people are marching in the streets of Paris, Lyon, Marseilles and other French cities Thursday, as more than 30 unions launch a massive workers' strike that's meant to shut down the country and force President Emmanuel Macron to reevaluate his plans for pension reform.

The strike is being compared to the crippling protests of 1995, which were also triggered by a retirement reform effort and which unraveled the career of former Prime Minister Alain Juppé.

Scientists know if they transfuse blood from a young mouse to an old one, that they can stave off, or even reverse, some signs of aging. But they don't know what in the blood is responsible for this remarkable effect.

Researchers now report that they've identified hundreds of proteins in human blood that wax and wane in surprising ways as we age. The findings could provide important clues about which substances in the blood can slow aging.

Updated at 1:43 p.m. ET

Federal law enforcement officials have announced criminal charges against two Russian nationals who operate a hacking organization known as Evil Corp., a group officials say is responsible for one of the most sweeping banking fraud schemes in the past decade.