Despite playing some of the best football, Paris Saint-Germain is once again on the brink of an early exit from Europe's elite club competition.

The French league leader — which has lost at this stage of the tournament in five of the past eight editions — travels to Liverpool later Tuesday for a mouth-watering Champions League last 16 tie, trailing 1-0 from the first leg.

Manchester United unveiled plans on Tuesday to build the "world's greatest" football stadium.

A proposed 100,000-seater arena would surpass Wembley as the biggest in the United Kingdom.

Neymar's justification for missing a semifinal with Santos was criticized because he was seen at Carnival last week.

Santos lost to archrival Corinthians 2-1 on Sunday in the semifinals of the Sao Paulo state championship, and Neymar sat on the bench for all 90 minutes. On Monday, he said he had a minor injury without elaborating.

Climate change is already causing all sorts of problems on Earth, but soon it will be making a mess in orbit around the planet too, a new study finds.

Researchers at the Massachusetts Institute of Technology calculated that as global warming caused by burning of coal, oil, gas continues, it may reduce the available space for satellites in low Earth orbit by anywhere from one-third to 82% by the end of the century, depending on how much carbon pollution is spewed. That's because space will become more littered with debris as climate change lessens nature's way of cleaning it up.

Most of the world has dirty air, with just 17% of cities globally meeting air pollution guidelines, a report Tuesday found.

Switzerland-based air quality monitoring database IQAir analyzed data from 40,000 air quality monitoring stations in 138 countries and found that Chad, Congo, Bangladesh, Pakistan and India had the dirtiest air. India had six of the nine most polluted cities with the industrial town of Byrnihat in northeastern India the worst.

A potent storm system is expected to pour heavy rain on western states later this week before rumbling into the central United States, where it could spawn tornadoes in the South and dump heavy snow across the parts of the Great Plains and Upper Midwest, creating blizzard conditions.

The ominous forecast comes as temperatures hit record highs in parts of the central U.S. after an active few days of weather across the nation. A possible tornado touched down in central Florida on Monday morning, tearing past a local television news station as its meteorologists were live on the air. No injuries were reported.

China wrapped up its biggest political event of the year on Tuesday leaving one question unanswered: How far will it go to try to revive economic growth in 2025?

A recurring theme throughout the weeklong meeting of the nearly 3,000-member National People's Congress was the need to boost investment and consumer spending.

Japan's trade minister said this week that he has failed to win assurances from U.S. officials that the key U.S. ally will be exempt from tariffs, some of which take effect on Wednesday.

Yoji Muto was in Washington for last ditch negotiations over the tariffs on a range of Japanese exports including cars, steel and aluminum.

Japan's has cut its estimate for its economic growth in the last quarter of the year to a 2.2% annual pace from 2.8% as consumer spending hit demand.

The Cabinet Office said Tuesday that Japan's real gross domestic product, which measures the sum value of a nation's goods and services, also was lower due to higher private inventories than earlier reported.

Polls opened in Greenland for early parliamentary elections Tuesday as U.S. President Donald Trump seeks control of the strategic Arctic island.

The self-governing region of Denmark is home to 56,000 people, most from Indigenous Inuit backgrounds, and occupies a strategic North Atlantic location. It also contains rare earth minerals key to driving the global economy.