Turkish President changed course to allow Sweden to join the NATO alliance, after more than a year of leveraging his position to meet a list of his demands. CNN's Salma Abdelaziz reports.

The color of the ocean has changed significantly over the last 20 years and human-caused climate change is likely responsible, according to a new study.

Read CNN's Meta Fast Facts to learn about the social media giant.

NATO Secretary General Jens Stoltenberg talks with CNN's Melissa Bell about Ukraine's future in NATO.

A sobering new report from the U.N. on maternal mortality in the Americas confirms previously reported statistics that African-American women in the U.S. are three times more likely to die while giving birth. Zain Asher speaks to Dr. Natalia Kanem, Executive Director at the United Nations Population Fund.

Stunning new images capture the birth of a star for the first time, as CNN's Tom Foreman reports

Read CNN's Fast Facts about Elon Musk and learn about the entrepreneur behind Tesla and SpaceX.

CNN's Will Ripley looks at how Kim Yo Jong, sister to Supreme Leader of North Korea Kim Jong Un, has become the voice behind North Korea's defiance and the mastermind behind the Kim Family brand.

A key Putin lieutenant has been reported missing, just days after the high-profile assassination of a Russian former submarine commander. CNN's Nick Paton Walsh reports on the series of turbulent events rocking Russia's' top brass.

Russian general Ivan Popov has been suddenly dismissed from his post commanding forces in occupied southern Ukraine, after accusing the leadership of the Ministry of Defense of betraying Russian soldiers by not providing sufficient support.