The evidence was compiled from a combination of high-temperature, high-pressure experiments in a lab specializing in studying geochemical reactions that take place deep within a planet under intense heat and pressure.
The exhibition, being held to September, was jointly arranged by Tamm's museum and the Guangdong Museum of Guangdong province. The items will be moved to Rome for exhibition later this year.
The fair will unfold at Beijing's China National Convention Center and in neighboring areas.
The federal offensive in the liberal city in the Pacific Northwest sparked criticism and legal challenges as videos surfaced of officers in camouflage without clear identification arresting protesters.
The exact cause of the fire is still under investigation.
The expansion will make Wuhan the biggest waterway-rail hub in China's inland area.
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The event, usually lasting about 10 days, attracted more than 421,000 attendants last year, about 22 percent of whom were from foreign countries, including China.
The finance ministry announced its resolve to further investigate provincial level governments' fund-raising procedures in the coming months, after the country's incremental local government debt stood at 16.8 trillion yuan by the end of October.
The experts suggested a proactive response for countries suffering from COVID-19 outbreaks.
The fast-growing aviation market will add pressure to airport infrastructure.