The world of news media is vast and diverse, with numerous news channels competing for viewership and influence across the globe. It's important to note that popularity can be measured in various ways, including viewership ratings, online presence, and impact on public discourse. While I can't provide an exhaustive list of every news channel, I can highlight some of the most popular and influential ones as of my last knowledge update in September 2021.

1. CNN (Cable News Network): CNN is one of the most recognizable names in global news. It was founded in 1980 and has a strong international presence. Known for its 24/7 news coverage, CNN reaches millions of viewers worldwide.

2. BBC News: The British Broadcasting Corporation (BBC) is a respected global news source. Its international arm, BBC News, provides comprehensive coverage of world events, with a focus on accuracy and impartiality.

3. Al Jazeera: Based in Qatar, Al Jazeera has grown into a global news network with a strong presence in the Middle East. It's known for its in-depth reporting on Middle Eastern and international affairs.

4. Reuters: While primarily a news agency, Reuters provides content to numerous news outlets worldwide. Its reputation for unbiased reporting and factual accuracy makes it a trusted source for many.

5. The New York Times: A prominent American newspaper, The New York Times has a significant global readership. It offers comprehensive international coverage and in-depth analysis.

6. Fox News: In the United States, Fox News is known for its conservative-leaning coverage. It has a substantial viewership and plays a pivotal role in shaping political discourse.

7. CNBC: CNBC specializes in business and financial news. It has a global reach and is widely watched by investors and business professionals.

8. BBC World News: As an extension of BBC News, BBC World News focuses exclusively on international news. It's available to viewers around the world and is respected for its coverage.

9. Sky News: A British news channel with an international reach, Sky News covers a wide range of topics, including politics, business, and culture.

10. The Guardian: This British newspaper is known for its online presence and international reporting. It provides insightful commentary on global events.

11. CCTV News (CGTN): China's state-owned international news channel, CGTN, reaches a vast global audience, offering perspectives from the Chinese government.

12. NPR (National Public Radio): In the United States, NPR is known for its radio news broadcasts and digital content. It's respected for its in-depth reporting and analysis.

13. France 24: A French international news channel, France 24 provides news and analysis from a European perspective.

14. DW News: Based in Germany, DW News offers international news and perspectives, particularly focusing on European and German affairs.

15. NHK World: Japan's international news channel, NHK World, covers global events from an Asian perspective.

It's important to remember that the popularity of news channels can vary by region and audience preferences. Additionally, the media landscape is constantly evolving, with new digital outlets and platforms emerging. As of my last knowledge update in September 2021, these channels were among the most popular and influential globally, but the rankings may have shifted since then.