It is time for humanity to grow up on climate change, Boris Johnson has said in a speech to the United Nations in New York.
US drug regulators have approved Pfizer booster vaccines for people over 65 if they had their last shot at least six months ago.
Joe Biden has played down the chances of brokering a post-Brexit free trade deal with the UK, as he held talks with Boris Johnson at the White House.
A 5.9 magnitude earthquake has rattled southeast Australia, damaging buildings in the city of Melbourne.
At least eight people have been killed after a gunman opened fire at a university in the Russian city of Perm, officials say.
President Vladimir Putin's party is well in the lead, with 45% of the vote for the 225 deputies apportioned by party lists.
Philippine boxing star Manny Pacquiao says he is to run for president in next year's election.
South Africa's President Cyril Ramaphosa has paid tribute to the new mayor of Johannesburg, following his death in a car crash aged 46.
Russian President Vladimir Putin entered self-isolation after people in his inner circle became infected with the coronavirus, the Kremlin said Tuesday, adding that the leader himself tested negative for COVID-19.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.