CNN Top Stories

Retired NASA astronaut Scott Kelly chats with CNN Correspondent Rachel Crane about the possibility of people exploring Mars.

Howard Dean claimed, with no evidence, that Donald Trump's sniffling at the debate could be due to cocaine use -- a comment that's being ripped as way out of bounds, even by those in his own party.

Samsung, maker of the troubled Galaxy Note 7 smartphone, has another problem on its hands.

It's been a week since a Charlotte, North Carolina, police officer shot and killed Keith Lamont Scott.

After initially pulling him over for speeding, a state trooper gives Mark Ross a ride home after the man's sister was killed in a car accident.

The logo for the CITES "world wildlife conference" underway in South Africa features a bunch of animals you'd readily associate with the international conservation movement.

Elizabeth Warren continues to be stoked about the Wells Fargo scandal. She wants CEO John Stumpf to step down and return all the money he made while Wells Fargo was creating fake accounts.

The US and Iraq have agreed on a plan that could send 500 or more additional US troops to Iraq in the coming days to assist Iraqi forces in the battle to retake Mosul from ISIS.

Donald Trump surrogate Rudy Giuliani says that Hillary Clinton's decision to stay with her husband after the Monica Lewinsky scandal makes her too stupid to be president.

Malaysia Airlines Flight 17 was shot down over eastern Ukraine by a Buk missile brought in from Russia to a pro-Russian area of eastern Ukraine, according to the head of the Dutch National Detective Force.

Chelsea Clinton said Donald Trump's threat to bring up her father's marital infidelities during a presidential debate is a "distraction from his inability to talk about what's actually at stake in this election."

San Francisco 49ers quarterback Colin Kaepernick didn't hold back Tuesday when he was asked by CNN about the first presidential debate.

San Francisco 49er Colin Kaepernick addresses both presidential candidates after the debate at Hofstra.

Authorities are still searching for tourists after a volcano erupted close to a popular Indonesian hiking area on Tuesday, shooting ash more than a mile into the air.

Chief official White House photographer Pete Souza is known for his coverage of President Obama's administration, but he first worked for government in the Reagan years.

Katy Perry and Madonna vote naked as part of a voter registration campaign by Funny or Die.

As kids become more independent, we want to foster their sense of responsibility and give them room to prove themselves. But it can be difficult to navigate this natural separation, especially when kids are doing who-knows-what on their devices. There are constant questions: Where are they? Who's contacting them? What are they doing online? Since tweens and teens are often tight-lipped about their lives, it can be tricky to get clear answers.

Amy Schumer may be very funny, but she can be bad for your computer's health.