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The War in Yemen is one of the world's worst humanitarian disasters but one mostly missing from the television screens. CNN's Becky Anderson reports.

NASA released footage of Hurricane Matthew as seen from the International Space Station.

Astronomer Tom Kerrs explains what we can learn by looking at the night sky

Samantha Cristoforetti spent 199 days in space. She tells CNN about life aboard the International Space Station.

Bas Landsdorp is CEO of Mars One, which plans to send humans on a one-way trip to Mars.

Journalist Theo Padnos was held for almost two years by Jabhat al-Nusra. He talks to Christiane Amanpour about his ordeal and how he managed to survive.

CNN's Kelly Wallace talk to kids who are concerned about Trump's treatment of women.

Sandra Aguebor is the first female mechanic in Nigeria and the founder of the Lady Mechanic Initiative, an organization that teaches women from diverse backgrounds how to fix cars and become financially independent. In Aguebor's garage, you’ll find tools to fix cars and so much more.

NASA released footage of Hurricane Matthew as seen from the International Space Station.

Pope Francis has had a number of memorable moments since assuming the papacy in 2013. Here are some of his best.

CNN's James Williams discovers what makes this historical metropolis tick, beginning with a ride on Bond's speed boat.

From helping it hatch to teaching it to speak and play, the Hatchimal requires your constant attention.

Would slavery have been abolished decades sooner? Could the Civil War have been avoided? Historian Thomas Fleming looks at what might have happened if Hamilton had lived.

Is it possible that Ronald Reagan might not have been president? Historian Timothy Naftali explores what might have happened if Nixon hadn't resigned.

Would nuclear catastrophe have ensued? Would JFK lived? Cold War historian Timothy Naftali explores what might have happened if the Cuban Missile Crisis had led to war.

Journalist Carl Bernstein hopes counterfactual "what-if" history will inspire viewers to learn actual history.

Might the Civil Rights movement emerged decades sooner? Lincoln historian Harold Holzer offers his thoughts on what might have happened if Abraham Lincoln had lived.

Would FDR have dropped the atomic bomb? Would McCarthyism have been allowed to thrive? Yale Historian Beverly Gage ponders what might have happened if FDR had lived.

See Momo. See Momo run. See Momo run much faster now that's he's taking an anti-aging pill.

If you’re a sailor aboard a freighter in the Great Lakes, it’s very difficult to get ashore to shop for supplies or mail a letter. Luckily, there’s one small tugboat that has been delivering mail, packages, and goods to ships in these lakes for the past 142 years: the J.W. Westcott. Operating out of Detroit, the J.W. Westcott is the only floating ZIP code in the United States and it delivers its mail by the pail.