Nasa’s latest Mars rover Perseverance launched yesterday on an astrobiology mission to look for signs of ancient microbial life -- and to fly a helicopter-drone on another world for the first time.

Amazon, Apple, Google and Facebook are too powerful and will likely emerge from the coronavirus pandemic even stronger, the head of a US congressional antitrust committee said Wednesday.

One person in the United States died about every minute from Covid-19 as the national death toll surpassed 150,000, the highest in the world.

President Donald Trump on Monday filed a new challenge to the Manhattan District Attorney’s subpoena for his tax returns, weeks after the US Supreme Court said the president was not immune from state criminal probes.

President Donald Trump mounted a strident defense of his wavering reelection bid with less than 100 days to go in a campaign that has seen him underwater in the polls -- and banking on the “silent majority” he vowed will bring him victory.

Representative Alexandria Ocasio-Cortez’s outrage over a Republican lawmaker’s verbal assault broadens into an extraordinary moment on the House floor as she and other Democrats assail a sexist culture of “accepting violence and violent language against women” whose adherents include President Donald Trump.

A Singaporean man who set up a fake consulting site to solicit information from US government and military workers has pleaded guilty to acting as an illegal agent of Chinese intelligence, the Justice Department says.

Billionaire philanthropist Bill Gates on Thursday pushed back against some of the conspiracy theories spreading online accusing him of creating the coronavirus outbreak.

Two US jets flew dangerously close to an Iranian passenger plane over war-torn Syria, forcing the pilot to take emergency action and sparking panic on board, Iranian authorities said yesterday.

President Donald Trump told his Russian counterpart Vladimir Putin on Thursday that he hopes to avoid an “expensive” US arms race with Russia and China, the White House said.

China orders the United States to close its consulate in the city of Chengdu, in a tit-for-tat response to being told to shut its consulate in Houston earlier, as relations between the two world powers deteriorates further.

The mayor of the US city of Portland, Ted Wheeler, is stung by tear gas after he joined demonstrators protesting against racial injustice and police brutality.

Democratic presidential candidate Joe Biden labels Donald Trump the first racist to become US president in remarks his opponent's re-election campaign quickly rebuked.

The US on Tuesday imposed sanctions on Venezuelan Chief Justice Maikel Moreno and announced a $5 million reward for information leading to his arrest or conviction for allegedly participating in transnational organized crime.

Scientists have known for several months the new coronavirus can become suspended in microdroplets expelled by patients when they speak and breathe, but until now there was no proof that these tiny particles are infectious.

The mayors of New York City and Chicago said on Tuesday they would take President Donald Trump to court if he sent unidentified US government agents to police their cities, pushing back on a threat that has sparked widespread controversy over the use of federal force.

President Donald Trump, in a shift in rhetoric and tone, encouraged Americans on Tuesday to wear masks if they cannot maintain social distance and warned that the coronavirus pandemic would get worse before it got better.

US Representative John Lewis, a pioneer of the civil rights movement and long-time member of the US House of Representatives, has died, House Speaker Nancy Pelosi says.

Americans debate mask mandates and the reopening of schools during the coronavirus pandemic as state and local officials impose conflicting orders and cases rise by more than 70,000 across the nation for the second day in a row.

President Donald Trump takes a swipe at health experts in his government leading the US response to the coronavirus, and one of them, Dr Anthony Fauci, answers with an appeal for states to stick to guidelines to snuff out a surge in cases.