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Their research suggests the rationale used to downgrade Pluto from a planet to a dwarf planet was not valid.

The Spix's macaw achieved onscreen fame in Disney's "Rio" as a charming parrot named Blu who travels thousands of miles in an attempt to save his species.

Midterm fever heats up. Hurricanes flank the US. Russia plans war games. Apple teases new gadgets. Catholic leaders in the hot seat. Here's what the next six days will bring.

Read CNN's Fast Facts and learn about violence against UN peacekeeping forces. This is a selected list of incidents from 1990 to the present.

For months, North Korea has been preparing a massive display of national unity and military might to mark the 70th anniversary of the country's founding.

Airstrikes were reported Saturday in the Syrian province of Idlib, the last remaining rebel stronghold in the war-torn country, according to volunteer rescue group the White Helmets and the Syrian Observatory for Human Rights.

Secretary of State Mike Pompeo has received a letter from Kim Jong Un to US President Donald Trump, according to a State Department official.

More than 100 US troops began an unexpected exercise in southern Syria on Friday in direct response to a series of Russian military threats, according to a US defense official.

US Secretary of Defense James Mattis made an unexpected trip to Afghanistan Friday, his visit coming as the US tries to make headway in the country after 17 years of war.

CNN's Will Ripley reports from Pyongyang three months after the historic meeting between President Trump and North Korean leader Kim Jong Un.