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Well, this is a new one.

President Donald Trump -- and his associates -- have given all sorts of reasons for his refusal to release his tax returns: He's under audit! Voters don't care! His taxes are too complex for regular people to understand!

In 1502, Leonardo da Vinci sketched out a design for what would have been the world's longest bridge at the time -- 280 meters (918.6 feet). Although the bridge itself was never built, engineers at the Massachusetts Institute of Technology have tested the design to see if it would work.

Bulgarian Prime Minister Boyko Borissov has called for the resignation of the president of the country's football association after England players were subjected to racist abuse during Monday's Euro 2020 qualifier.

Thirteen Mexican police officers were killed in an ambush Monday in Michoacan, according to local authorities in the violent western state.

Former Vice President Joe Biden's son Hunter Biden said he used "poor judgment" in serving on the board of a Ukrainian gas company because it has become a political liability for his father.

Police in Nigeria have rescued 67 men and boys who were subjected to "inhumane and degrading treatments" at an Islamic school in the northern state of Katsina, a police spokesman said Tuesday.

The United States is a democracy, which means everyone gets to vote in US elections, right? Wrong. Who gets to vote and how easy it is for those voters to cast their ballots has been an ongoing fight since the U.S. Constitution was written.

Portugal striker Cristiano Ronaldo scored his 700th career goal in his country's Euro 2020 qualifier 2-1 defeat by Ukraine Monday.

• Trump tries to rewrite reality

• 24 hours changed how the world works• Volkswagen pauses $1.4B investment in Turkey• Anger as Turkish players repeat military salute

Basketball star LeBron James has finally weighed in on the ongoing NBA-China dispute, criticizing Houston Rockets General Manager Daryl Morey as being misinformed about the situation.

For the first time in almost three decades, North and South Korea's men's football teams faced each other in Pyongyang.

As names go, it's quite a mouthful -- Patrizia Sandretto Re Rebaudengo. But it's one that everybody in the world of contemporary art knows.

She was one of only a few celebrities to be publicly pro-choice when South Korea legalized abortion this year, was open about her own mental health struggles and insisted women shouldn't have to wear bras if they found them uncomfortable.

Facing scathing criticism from Republican lawmakers and members of his own military, President Donald Trump on Monday sought to project a harder line on Turkey as the country pushes further into northern Syria.

A four-day-old baby girl has been rescued after she was found buried alive in a cemetery in northern India.

Vietnam's largest cinema chain has pulled a new Dreamworks animated movie from theaters because it features a map asserting Chinese ownership over the South China Sea.

A Euro 2020 qualifier match between Bulgaria and England in Sofia was temporarily halted twice Monday night after apparently racist abuse was hurled at English players.

With the Duke and Duchess of Cambridge enjoying a five-day tour of Pakistan this week, royal watchers have shifted their gaze to the region.

Residents on fixed cellphone contracts in India-controlled Kashmir were surprised to discover they had been billed for the two-month, government-imposed communications blackout when it partially ended earlier this week.

Hong Kongers have been protesting for more than four months and demonstrations are becoming more violent and disruptive. The city's leaders have maintained Hong Kong is still open for business, but is it still safe to visit?

An eight-year-old boy reeled in a 314-kilogram (692-pound) tiger shark on a fishing trip with his dad in Australia -- possibly setting a new world record.

We may have already discovered the essence of life on Mars 40 years ago, according to a former NASA scientist.

Before a Fort Worth police officer killed a woman in her home on Saturday, the department was already under scrutiny.

The Fort Worth police officer who fatally shot Atatiana Jefferson in her home Saturday morning resigned on Monday, interim police chief Ed Kraus said.

When the disgraced health entrepreneur Elizabeth Holmes was indicted on fraud charges for her lab-testing company Theranos last year, much of the media discussion rested not on her alleged corporate recklessness and staggering abuses of trust, but on her sartorial choices: black jackets, black slacks, and -- most importantly -- black turtlenecks.

According to Ronan Farrow's new book, The National Enquirer's top editor directed staffers to shred documents when the Wall Street Journal called for comment before publishing the first story about the Enquirer's "catch and kill" relationship with Donald Trump.

Scientist Sandy Song remembers when she first saw the aggressive swirl of the monster storm approaching on satellite images at her office at the Hong Kong Observatory.

A California woman learns her child is alive 30 years after being told he had died shortly after birth. CNN affiliate KMPH has more.

This year's Booker Prize goes against the rules and traditions of the award by naming both Margaret Atwood and Bernardine Evaristo as joint winners on Monday.

What was President Donald Trump thinking when he abruptly announced that he had agreed to reverse years of US policy in Syria and withdraw American forces, clearing the way for Turkey to launch an attack on what had been loyal US allies, handing a long-sought victory to America's foes, including Iran and Russia

President Donald Trump's fight to keep his tax returns private is at odds with his own thinking in 2013 and 2014 that releasing them as part of a presidential bid would make him look like a smart businessman who had spent years lowering his taxable income, according to two people with firsthand knowledge of conversations at the time.

Earlier this year I spent almost two months in northeast Syria covering what we thought was the final battle against ISIS. The so-called caliphate that stretched from the outskirts of Baghdad to western Syria, that ruled over more than ten million people, had been reduced to the remote town of Baghouz on the banks of the Euphrates.

A Pennsylvania teacher was put on administrative leave without pay after a video surfaced showing her use racist language against a parent she'd gotten into a fender bender with.

Pope Francis' chief bodyguard resigned Monday over a leak related to an ongoing financial investigation, the Vatican said.

A fake video that depicts in extremely graphic fashion President Trump attacking and shooting his critics and media outlets does not violate YouTube's policies against content that incites violence because it is "purely fictional," the company told CNN Business Monday.

It took hours for the White House to issue a condemnation of the disgusting video obtained by the New York Times that depicts President Trump violently slaughtering journalists and political opponents (including former President Obama and sitting members of Congress). The footage, created from a grisly scene in a Hollywood movie, was shown at a meeting of the pro-Trump political group, American Priority, at the Trump Doral resort.

The pageantry may be over, but the UK's bumper Brexit week has only just begun.

CNN's Nick Paton Walsh reports on the shifting situation in Syria as the battle for land leaves citizens caught in a daily cycle of uncertainty and violence.

Several leading French politicians have called for France's Euro 2020 qualifier against Turkey in Paris to be called off after Turkish players enacted a military salute in Friday's victory over Albania.

K-pop star Sulli, formerly of the band f(x), has been found dead at her home.