It's been nearly 20 years since Calvin and Hobbes creator Bill Watterson ended his beloved comic strip — but the release of a brand-new Watterson comic shows that his work is as sharp and engaging as ever.

As the primary honoree of France's Angoulême International Comics Festival, Watterson agreed to draw a brand-new comic to serve as the festival's poster:

In an interview, Watterson called the project "an interesting challenge." Leave it to the creator of Calvin and Hobbes to come up with a wordless story that's entertaining no matter what language you speak. Scott Meslow

Team USA's Michael Phelps earned his 20th Olympic gold Tuesday at the Rio Olympics, his 24th Olympic medal overall, after winning the 200m butterfly.

The 31-year-old, who set the world record in the event in 2009, finished the race in 1:53.36, just .04 seconds ahead of silver medalist Masato Sakai of Japan. During the 2012 Olympics, Phelps took the silver medal in the 200m butterfly, finishing behind South Africa's Chad le Clos. This year, le Clos came in fourth with a time of 1:54.06. Catherine Garcia

The mayor of Los Angeles says the city is the "risk-free" choice to host the 2024 Olympics.

"Our Olympic infrastructure is already in the ground, not on the drawing boards," Eric Garcetti said Tuesday. "We are virtually risk-free because we only have to build one venue to host the Games. Instead of construction anxieties for the next seven years, we can focus on what's important." The U.S. last hosted a Summer Olympics in Atlanta in 1996, and Los Angeles is up against Paris, Rome, and Budapest for the 2024 Games; the host city will be chosen in September 2017.

Brazil was plagued with problems in the run up to the Olympics, from the threat of Zika virus to slow construction of venues to a political crisis involving the country's president. Garcetti says 88 percent of locals are in favor of having the Olympics, and because there would be so little construction, the Olympics would be a big moneymaker; in 1984, the Los Angeles Games had a profit of $225 million. "We're very confident that our plan reduces risks dramatically and can produce a profit for the city," bid chairman Casey Wasserman said. "Our job is to deliver a fiscally responsible budget." Catherine Garcia

Serena Williams was defeated Tuesday at the Rio Olympics during the third round of the singles tournament, losing to Elina Svitolina of Ukraine in straight sets. Svitolina is ranked 20th in the world, and beat top-seeded Williams 6-4, 6-3. Williams and her sister, Venus, lost in the first round of doubles play, and Venus Williams was defeated during the first round of the singles tournament. During the 2012 Olympics, Serena Williams won gold in singles and doubles. Catherine Garcia

Sen. Elizabeth Warren (D-Mass.) loves to poke the bear that is Donald Trump, and she wasted no time reacting to his comments about "Second Amendment people" stopping Hillary Clinton from picking Supreme Court judges.

Twitter is clearly Trump's favorite way to communicate, and since he has had difficulty in the past not talking about Warren, expect some sort of tweetstorm soon. Previously, Warren has called Trump a "thin-skinned racist bully," "a genuine threat to this country," and an "insecure money-grubber," whose only idea is "building that stupid wall". Catherine Garcia

Speaking from Wilmington, North Carolina, on Tuesday, Republican presidential nominee Donald Trump suggested that perhaps "Second Amendment people" could prevent Hillary Clinton from picking Supreme Court judges. The comment set off widespread outcry over what many believed was an extraordinarily inappropriate, and even threatening, suggestion.

"This is simple — what Trump is saying is dangerous. A person seeking to be the president of the United States should not suggest violence in any way," Clinton's campaign manager Robby Mook said in a statement.

Trump's campaign responded to the controversy by publishing a "statement on dishonest media," in which communications adviser Jason Miller claimed that the comment had been meant to imply unification, not anything more sinister. "Second Amendment people have amazing spirit and are tremendously unified, which gives them great political power. And this year, they will be voting in record numbers, and it won't be for Hillary Clinton, it will be for Donald Trump," he said. Jeva Lange

A Quinnipiac University poll out Tuesday showed Hillary Clinton surging in the swing states of Florida, Ohio, and Pennsylvania. In Pennsylvania, where Clinton now leads Donald Trump by 10 points, 52 percent to 42 percent, she gained 12 points since Quinnipiac's poll last month. While her winning margins in Ohio and Florida are slimmer (and in Florida's case, within the poll's margin of error), Clinton still enjoyed healthy gains in both. Clinton got a 4-point boost in Ohio to lead 49 to 45 percent, and in Florida she's now ahead by 1 point, 46 percent to 45 percent, thanks to a 4-point bump since last month.

The poll's margin of error in Florida is plus or minus 3 percentage points. In Ohio and in Pennsylvania, it's plus or minus 3.4 percentage points. Becca Stanek

Fans of gymnast Simone Biles and swimmers Michael Phelps and Katie Ledecky will want to tune into the Rio Olympic Games on Tuesday night. Biles and the U.S. women's gymnastics team will vie for the gold they're expected to win in the women's team all-around final. China and Russia are also contenders.

In the pool, Ledecky will compete in the 200-meter freestyle final, just two days after she shattered her record in the 400-meter freestyle to win her first gold. If Ledecky lands a win tonight, she'll be one medal away from being the first female swimmer since 1968 to win gold in the 200-, 400-, and 800-meter freestyle all within one Olympic Games.

And, in what The New York Times described as "one of the most anticipated showdowns of the Rio Games," Phelps will race the 200-meter butterfly against South Africa's Chad Le Clos, who he lost to in 2012.

As of Tuesday afternoon, the U.S. and China were tied with five gold medals each, though the U.S. was ahead overall with seven silver medals and eight bronze to China's three silver and five bronze. Becca Stanek